Make sure all validator/converter classes are on the classpath of the war (putting them in the ejb jar doesn't work) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4079807#4079807 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4079807