Exhibit A to SCHEDULE 13G JOINT FILING AGREEMENT Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, the undersigned parties hereby agree that the preceding Schedule 13G is being filed on behalf of each of them. IN WITNESS WHEREOF,...

                                  Exhibit A
                                      to
                                 SCHEDULE 13G



                            JOINT FILING AGREEMENT

            Pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of
1934, the undersigned parties hereby agree that the preceding Schedule 13G is
being filed on behalf of each of them.

            IN WITNESS WHEREOF, the parties hereto have duly executed this
agreement on this 12th day of February 2002.

                                          XXXX XXX


                                          /s/Xxxx X. Xxx
                                          -------------------------------------


                                          MWHC HOLDING, INC.


                                          /s/Xxxx X. Xxx, President
                                          -------------------------------------