Post the entire exception stacktrace. When does this exception occur? Does it happen when you are doing a lookup of the datasource and trying to obtain a connection from it? If yes, then have you specified the PROVIDER_URL as 128.173.23.123 to the InitialContext (since the services are longer binded to localhost): Properties props = new Properties(); | props.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory"); | props.put(Context.PROVIDER_URL,"jnp://128.173.23.123:1099"); | Context ctx = new InitialContext(props); | ctx.lookup("blahblahblah"); View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4126000#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...