JBoss 2.6 doesn't support JBoss 5. And please don't use 2.6.4 now, it's not released. it's in QA phase View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4127155#4127155 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4127155