It looks like you are trying to deploy it on JBoss AS 5, JBoss Federated SSO does ot support 5 only 4.3 View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4214977#4214977 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4214977