Hi Ronald, thanks for working on that. I tried on JBoss 4.0.4, which comes with myfaces (1.1) in tomcat5.5.sar. I removed the jars, but that didn't work either. The only chance that this is "regular" class loading problem is that there are some faces-jars somewhere else in jboss ("find" didn't find any of them though) I will check with a fresh install later on. Thanks again Karsten PS: What persistence configuration did you use for your test? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4084644#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...