Jaikiran, thanks for your offer, very kind of you. I just (temporarily) resolved the problem by deploying the jar that contains the EJBs in addition to the application ear. (I placed the sipsenterprise.ear as well as sipsentites.jar (which is already contained in the .ear file) into the server deploy directory). So, I figure the problem is related to the packaging of the ear, and this temporary fix will work for me for a while. Thx for your support. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3982211#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...