anonymous wrote : java.lang.IncompatibleClassChangeError: Class org.jnp.server.NamingServer does not implement the requested interface org.jnp.interfaces.Naming Do you include any jar file(s) containing org.jnp.* classes in your application packaging? If yes, then remove those jar files from your application. They are already available in %JBOSS_HOME%\server\< serverName>\lib folder. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4174799#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...