What is SelectService? An EJB3 bean? You need to cast to its interface, not its implementation. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4102725#4102725 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4102725