I'm also interested to know why I get this error but it works for some people. Why do some people not have javassist proxies? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3993142#3993142 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3993142