Solved the problem: Deleted the <loader-repository> tag of my jboss-app.xml. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4133573#4133573 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4133573