<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>3
<FILENAME>b45308mcexv99w1.txt
<DESCRIPTION>JOINT FILING AGREEMENT DATED FEBRUARY 4, 2003
<TEXT>
<PAGE>
                                                                       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 4, 2003


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


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


                                        LIBERTY ACORN TRUST


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


                               Page 10 of 10 Pages

</TEXT>
</DOCUMENT>
