You are missing adding/updating jboss-aop at /lib Look at instalation guide... there is a statement saying that if you want to using JBM and JBAS 4.0.4 you would have to do it at your own risk as you would need to update some libraries. And that's what you have to do.... either update/install these libraries at jbas/server/lib or start using JBAS 4.2 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4056080#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...