Hi Peter, Thank you for your help. I just need to put regular expression class in the WEB-INF/lib. Torben View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3996832#3996832 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3996832