I have a solution for my problem. I replaced the switch statement in the Request class with an if() else statement. I am now able to deploy the application. Let this be a lesson for all: Do not use enum with javassist and switch statements together! Although if() else isn't beautiful programming it does the job and that's the most important thing! Thanks all that replied to my posting. Regards, Werner View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4243642#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...