Anyone help me with the following problem?

After I unzipped jboss4.0 and didn't alter any configuration, ran a sample jms, it couldn't loopup ConnectionFactory:

javax.naming.NameNotFoundException: ConnectionFactory not bound

 Hashtable env = new Hashtable();
 // using JBoss...
 env.put(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
 env.put(Context.PROVIDER_URL, "jnp://127.0.0.1:1099");


 InitialContext jndi = new InitialContext(env);

 // Look up a JMS connection factory
 // I don't know where to config connectionFactory, use the default.
 TopicConnectionFactory conFactory =
 (TopicConnectionFactory)jndi.lookup("ConnectionFactory");//XAConnectionFactory