Get rid of JSF libs in you web-inf/lib and use the default ones in JBoss app server. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4209488#4209488 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=4209488