Problem about JNDI support: the connection.start hang up and no response.

[lzr]

Hi all,
 
Currently I'm studying the JNDI support with Active MQ 520 and found the 
Connection.start will hang up and no response. It will be much appreciated if 
anybody could help identify the issues!!!!
The following codes is my implemenation:
            Properties props = new Properties();
            props.put(InitialContext.INITIAL_CONTEXT_FACTORY, 
"org.apache.activemq.jndi.ActiveMQInitialContextFactory");
            props.put("jms/ConnFactory", "ConnectFactory");
            InitialContext ctx = new InitialContext(props);
            ConnectionFactory connectionFactory = (ConnectionFactory) 
ctx.lookup("ConnectionFactory");
            conn = connectionFactory.createConnection();
            conn.start();

Best regards,
Zhuran Li