The following code worked in JBoss 3.2.7
Which now fails using JBoss 4.0.3SP1,JDK1.5,LinuxOS(Intel).

(Client)
Properties properties = new Properties();
 properties.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
 properties.put(Context.PROVIDER_URL, "localhost:1099");

 InitialContext iniCtx = new InitialContext(properties);
 Object tmp = iniCtx.lookup("ConnectionFactory");
 QueueConnectionFactory connFactory = (QueueConnectionFactory) tmp;
 logger.info("obtained the queue connection factory..");
 QueueConnection conn = connFactory.createQueueConnection();
 Queue que = (Queue) iniCtx.lookup(Const.TEST_QUEUE);
 logger.info("obtained the queue");

 QueueSession session = conn.createQueueSession(false,QueueSession.AUTO_ACKNOWLEDGE);
 QueueSender sender = session.createSender(que);
 long fileSz = f.length();
 BufferedReader reader = new BufferedReader(new FileReader(f));
 char[] buf = new char[(int)fileSz];
 reader.read(buf);


 String data = new String(buf);
 MyMessage msg = null;
 msg = parser.parse(data);

 ObjectMessage objMessage = session.createObjectMessage();

 objMessage.setObject(msg);
 sender.send(que,objMessage);

 if( repository == null )
 {
 String msg = "Invalid use of destroyed classloader, UCL destroyed at:";
 throw new ClassNotFoundException(msg, this.unregisterTrace);
 }