How did you build your server? Did you use the ant buildfile that comes with the project? Make sure that you execute the ant jar target before you run your project. You can extra information on this in the url=http://www.jivesoftware.org/builds/messenger/docs/latest/documentation/sourc e-build.htmlJive Messenger Source Build Instructions[/url]
During the Messenger build process the build script “explodes” the whack.jar file and uses the Presence java file contained within it. So, to modify that class you’'ll want to check the whack project out of SVN, make your changes, and then rebuild the jar file.