You never said which version of JBoss AS you are using. I will assume 4.2.x. You need a 5.0 JDK for that version. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4096768#4096768 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4096768