UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                               (Amendment No.   4    )*
                                             --------

                         Christopher & Banks Corporation
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    171046105
                        ---------------------------------
                                 (CUSIP Number)

                                December 31, 2003
              -----------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)

    Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:

                                [x] Rule 13d-1(b)
                                [_] Rule 13d-1(c)
                                [_] Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                               Page 1 of 10 pages



------------------------                                  ----------------------
CUSIP No. 171046105                        13G            Page 2 of 10 Pages
          --------------
------------------------                                  ----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           Columbia Wanger Asset Management, L.P.  36-3820584
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

           Not Applicable                                                (a) [_]

                                                                         (b) [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

           Delaware
--------------------------------------------------------------------------------
                     5  SOLE VOTING POWER
     NUMBER OF
                           None
       SHARES      -------------------------------------------------------------
                     6  SHARED VOTING POWER
    BENEFICIALLY
                           4,977,850
      OWNED BY     -------------------------------------------------------------
                     7  SOLE DISPOSITIVE POWER
        EACH
                           None
     REPORTING     -------------------------------------------------------------
                     8  SHARED DISPOSITIVE POWER
    PERSON WITH
                           4,977,850
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           4,977,850
--------------------------------------------------------------------------------
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

           Not Applicable                                                    [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           13.2 %
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON*

           IA
--------------------------------------------------------------------------------



------------------------                                  ----------------------
CUSIP No. 171046105                        13G            Page 3 of 10 Pages
          --------------
------------------------                                  ----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          WAM Acquistion GP, Inc.
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

          Not Applicable                                                 (a) [_]

                                                                         (b) [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

          Delaware
--------------------------------------------------------------------------------
                    5  SOLE VOTING POWER
     NUMBER OF
                           None
       SHARES      -------------------------------------------------------------
                     6  SHARED VOTING POWER
    BENEFICIALLY
                           4,997,850
      OWNED BY     -------------------------------------------------------------
                     7  SOLE DISPOSITIVE POWER
        EACH
                           None
     REPORTING     -------------------------------------------------------------
                     8  SHARED DISPOSITIVE POWER
    PERSON WITH
                           4,977,850
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          4,977,850
--------------------------------------------------------------------------------
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

          Not Applicable                                                     [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

          13.2 %
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON*

          CO
--------------------------------------------------------------------------------



------------------------                                  ----------------------
CUSIP No. 171046105                        13G            Page 4 of 10 Pages
          --------------
------------------------                                  ----------------------

--------------------------------------------------------------------------------
  1    NAME OF REPORTING PERSON
       S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Columbia Acorn Trust
--------------------------------------------------------------------------------
  2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

          Not Applicable                                                 (a) [_]

                                                                         (b) [_]
--------------------------------------------------------------------------------
  3    SEC USE ONLY

--------------------------------------------------------------------------------
  4    CITIZENSHIP OR PLACE OF ORGANIZATION

          Massachusetts
--------------------------------------------------------------------------------
                    5  SOLE VOTING POWER
     NUMBER OF
                           None
       SHARES      -------------------------------------------------------------
                     6  SHARED VOTING POWER
    BENEFICIALLY
                           4,086,750
      OWNED BY     -------------------------------------------------------------
                     7  SOLE DISPOSITIVE POWER
        EACH
                           None
     REPORTING     -------------------------------------------------------------
                     8  SHARED DISPOSITIVE POWER
    PERSON WITH
                           4,086,750
--------------------------------------------------------------------------------
  9    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          4,086,750
--------------------------------------------------------------------------------
  10   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

          Not Applicable                                                     [_]
--------------------------------------------------------------------------------
  11   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

          10.8 %
--------------------------------------------------------------------------------
  12   TYPE OF REPORTING PERSON*

          IV
--------------------------------------------------------------------------------



Item 1(a)       Name of Issuer:

                     Christopher & Banks Corporation

Item 1(b)       Address of Issuer's Principal Executive Offices:

                     2400 Xenium Lane North
                     Plymouth, Minnesota  55441-3626

Item 2(a)       Name of Person Filing:

                     Columbia Wanger Asset Management, L.P. ("WAM")
                     WAM Acquisition GP, Inc., the general partner of WAM
                        ("WAM GP")
                     Columbia Acorn Trust ("Acorn")

Item 2(b)       Address of Principal Business Office:

                     WAM, WAM GP and Acorn are all located at:

                     227 West Monroe Street, Suite 3000
                     Chicago, Illinois  60606

Item 2(c)       Citizenship:

                     WAM is a Delaware limited partnership; WAM GP is a Delaware
                     corporation; and Acorn is a Massachusetts business trust.

Item 2(d)       Title of Class of Securities:

                     Common Stock

Item 2(e)       CUSIP Number:

                     171046105

Item 3          Type of Person:

                     (d)   Acorn is an Investment Company under section 8 of the
                           Investment Company Act.

                     (e)   WAM is an Investment Adviser registered under section
                           203 of the Investment Advisers Act of 1940; WAM GP is
                           the General Partner of the Investment Adviser.

                               Page 5 of 10 Pages



Item 4          Ownership (at December 31, 2003):

                     (a)   Amount owned "beneficially" within the meaning of
                           rule 13d-3:

                           4,977,850

                     (b)   Percent of class:

                           13.2 % (based on 37,800,693 shares outstanding as of
                           December 26, 2003).

                     (c)   Number of shares as to which such person has:

                                (i)  sole power to vote or to direct the vote:
                                     none

                               (ii)  shared power to vote or to direct the vote:
                                     4,977,850

                              (iii)  sole power to dispose or to direct the
                                     disposition of: none

                               (iv)  shared power to dispose or to direct
                                     disposition of: 4,977,850

Item 5          Ownership of Five Percent or Less of a Class:

                     Not Applicable

Item 6          Ownership of More than Five Percent on Behalf of Another Person:

                     The shares reported herein have been acquired on behalf of
                     discretionary clients of WAM, including Acorn. Persons
                     other than WAM and WAM GP are entitled to receive all
                     dividends from, and proceeds from the sale of, those
                     shares. Acorn is the only such person known to be entitled
                     to all dividends from, and all proceeds from the sale of,
                     shares reported herein to the extent of more than 5% of the
                     class.

Item 7          Identification and Classification of the Subsidiary Which
                Acquired the Security Being Reported on by the Parent Holding
                Company:

                     Not Applicable

Item 8          Identification and Classification of Members of the Group:

                     Not Applicable

Item 9          Notice of Dissolution of Group:

                     Not Applicable

                               Page 6 of 10 Pages



Item 10   Certification:

               By signing below I certify that, to the best of my knowledge and
          belief, the securities referred to above were acquired and are held in
          the ordinary course of business and were not acquired and are not held
          for the purpose of or with the effect of changing or influencing the
          control of the issuer of the securities and were not acquired and are
          not held in connection with or as a participant in any transaction
          having that purpose or effect.

                               Page 7 of 10 Pages



                                    Signature

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

Date: February 13, 2004

          The undersigned corporation, on the date above written, agrees and
          consents to the joint filing on its behalf of this Schedule 13G in
          connection with its beneficial ownership of the security reported
          herein.

                                     WAM Acquisition GP, Inc.
                                      for itself and as general partner of
                                      COLUMBIA WANGER ASSET MANAGEMENT, L.P.


                                     By: /s/ Bruce H. Lauer
                                        ----------------------------------------
                                             Bruce H. Lauer
                                             Senior Vice President and Secretary

          The undersigned trust, on the date above written, agrees and consents
          to the joint filing on its behalf of this Schedule 13G in connection
          with its beneficial ownership of the security reported herein.

                                     COLUMBIA ACORN TRUST

                                     By: /s/ Bruce H. Lauer
                                         ---------------------------------------
                                         Bruce H. Lauer
                                         Vice President, Treasurer and
                                         Secretary

                               Page 8 of 10 Pages



                                  Exhibit Index

Exhibit 1     Joint Filing Agreement dated as of February 13, 2004 by and among
              Columbia Wanger Asset Management, L.P., WAM Acquisition GP, Inc.
              and Columbia Acorn Trust.

                               Page 9 of 10 Pages



                                                                       EXHIBIT 1

                             JOINT FILING AGREEMENT

     The undersigned hereby agree to the joint filing of the Schedule 13G to
which this Agreement is attached.

               Dated: February 13, 2004

                                    WAM Acquisition GP, Inc.
                                     for itself and as general partner of
                                     COLUMBIA WANGER ASSET MANAGEMENT, L.P.


                                    By: /s/ Bruce H. Lauer
                                        ----------------------------------------
                                            Bruce H. Lauer
                                            Senior Vice President and Secretary

                                    COLUMBIA ACORN TRUST


                                    By: /s/ Bruce H. Lauer
                                        ----------------------------------------
                                            Bruce H. Lauer
                                            Vice President, Treasurer and
                                            Secretary

                              Page 10 of 10 pages