remove this ajax4jsf 1.1.1. richfaces comes with bundled ajax4jsf. download latest stable version and remove old jars. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4108328#4108328 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4108328