I googled 2 days, and read "ejb in action", "enterprise java bean3". but got nothing useful. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4264253#4264253 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4264253