Most commen error is to forget to declare the Observer method on the interface, if it's a SessionBean. Greetz GHad View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4126025#4126025 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4126025