There was another thread on this forum recently which explained what libraries you need to use for JBoss 5, please have a search. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4134021#4134021 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4134021