I'll answer this one myself. It turns out that, in your jboss.xml file, when using EJB3 you shouldn't use the full JNDI path to point to your seurity domain but just to the name of the security domain. So instead of: | <jboss> | <security-domain>java:/jaas/my_security_domain</security-domain> | </jboss> It should be: <jboss> | <security-domain>my_security_domain</security-domain> | </jboss> /klejs View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3987147#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...