As expected, i didnt put in the jboss-el.jar in the classpath of the ejb and the webapp. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4093616#4093616 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4093616