There are errors on your server console: anonymous wrote : Caused by: java.lang.UnsupportedClassVersionError: Bad version number in .class | file | Looks like you are using an lower version of JDK (i guess 1.5) against a server which requires an higher version (1.6). You probably downloaded the JDK 6 variant of JBoss AS 5.1.0 Beta1. You have two options: 1) Use the current AS but upgrade your JDK to JDK 6 (and set JAVA_HOME appropriately). 2) OR download the JDK 5 variant of the AS 5.1.0 Beta1 and use it against the current JDK 5 that you have View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4218892#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...