Is com.acme.model.persistence.Product included on the client classpath (i.e. within appClient.jar)? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4030785#4030785 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4030785