how to make client cross the firewall on tcp connector?

hi all
   
  I an using openjms-0.7.7-alpha-1 
  I have a remote client behind a firewall/router that I am trying to listen to messages.
  I used http connector but it's so slowly,so i want to change to use tcp connector ,and i get error as follow
 
 javax.jms.JMSException: Failed to connect to URI=tcp://218.30.254.80:5000/
        at org.exolab.jms.client.net.JMSExceptionAdapter.adapt(JMSExceptionAdapter.java:79)
        at org.exolab.jms.server.net.RemoteServerConnection__Proxy.getConnectionId(RemoteServerConnection__Proxy.java:89)
        at org.exolab.jms.client.net.JmsConnectionStubImpl.getConnectionId(JmsConnectionStubImpl.java:131)
        at org.exolab.jms.client.JmsConnection.<init>(JmsConnection.java:176)
        at org.exolab.jms.client.JmsTopicConnection.<init>(JmsTopicConnection.java:81)
        at org.exolab.jms.client.JmsConnectionFactory.createTopicConnection(JmsConnectionFactory.java:353)
        at org.exolab.jms.client.JmsConnectionFactory.createTopicConnection(JmsConnectionFactory.java:335)

 my openjms.xml is 
<ServerConfiguration host="219.142.80.35" embeddedJNDI="true" />
  
  <Connectors>
    <Connector scheme="rmi">
      <ConnectionFactories>
        <QueueConnectionFactory name="JmsQueueConnectionFactory" />
        <TopicConnectionFactory name="JmsTopicConnectionFactory" />
      </ConnectionFactories>
    </Connector>
    <Connector scheme="tcp">
      <ConnectionFactories>
        <ConnectionFactory name="TCPConnectionFactory"/>
      </ConnectionFactories>
    </Connector>
  </Connectors>

  <TcpConfiguration port="5000" internalHost="218.30.254.80" jndiPort="5000" adminPort="5000" bindAll="true" />


  any one can give some advice?thank you very much!

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