I am not sure whether this is the reason, but i see SIPS.jar in two places, one is under APP-INF/lib/ and the other inside SIPSEntities.jar. Give it a try by removing the one in SIPSEntities.jar. Also, i dont think you should have those jboss-j2ee.jar and jbossall-client.jar in your package. I recommend removing these 2 files as well and try it out. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3981579#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...