"dustismo" wrote : Richfaces suffers from the same classloading problems as icefaces. Have you tried setting the usejbossslassloader=true (search the forums for instructions)? | | -Dustin thanks, it helped. I have edited the server/default/deploy/jbossweb-tomcat55.sar/META-INF/jboss-service.xml and changed Java2ClassLoadingCompliance and UseJBossWebLoader from false to true, and suddenly, the error disappeared. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4029719#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...