I think you are trying to use cfWatcher2.1 with java 1.4 while it should be run at least on java 1.5 . You may consider to set your CF to run on java 1.5 or java 6, or use cfWatcher 1. But there are a couple of things to be noted: 1) if to set CF to run on java 5/6, it will not be the officially supported way by adobe for CF to run, so theoretically you may run in some problems as being for example the fact that you will can't invoke some of the webservices. I think i had such problems with google api. 2) if you will use cfWatcher 1, you will not have available a big part of the features that cfWatcher 2.1 have. Hope that helps.