Let's try to eliminate three possible problem areas. First, are you using NetBeans to start the server? If so, don't. Instead, start the server using the run.bat file from a command line. This will eliminate any weirdness introduced by NetBeans. Second, try copying C:\Program Files\Java\jdk1.5.0_14 to c:\jdk1.5.0_14 and change JAVA_HOME to c:\jdk1.5.0_14. (You do not have to re-install, copying the whole directory structure is fine.) This will eliminate any weirdness introduced by using Java stuff in directories with spaces in their names. Third, you are running the 'all' configuration which assumes clustering (hence the reference the JmsXA data source, it would help it I read the entire post). Try running the 'default' configuration instead (copy your ear file from the server/all/deploy directory to server/default/deploy). Also, what is in your WEB-INF/jboss-web.xml file? Are there any references to your EJBs in the global namespace? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4107445#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...