Did you download the correct version of the AS? There are 2 versions, one for JDK5 and the other for JDK6. Which one did you download? Also, the GA version of JBoss-AS5 has been released. You might want to start using this new version. This version too has 2 downloads, make sure you download the correct one. And finally, for JBossAS5 specific question, there's a dedicated forum at http://www.jboss.com/index.html?module=bb&op=viewforum&f=287 View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4195304#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...