It works with *any* object - take a look at the ui example. Post the whole stack trace. You are using 1.2.1.GA? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4053688#4053688 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4053688