Schedule 13D Page 13 of 13 EXHIBIT 99.1 JOINT FILING AGREEMENT The Reporting Persons have agreed that a single Schedule 13D (or any amendment thereto) relating to the Common Stock of Click Commerce, Inc. shall be filed on behalf of each of the...

Schedule 13D                                                       Page 13 of 13

EXHIBIT 99.1

                             JOINT FILING AGREEMENT

         The Reporting Persons have agreed that a single Schedule 13D (or any
amendment thereto) relating to the Common Stock of Click Commerce, Inc. shall be
filed on behalf of each of the Reporting Persons. Note that copies of the
applicable agreement are already on file with the appropriate agencies.