连接ActiveMQ的JMX问题

代码如下，连接到远程的一个ActiveMQ服务器的JMX功能。已知的是，其它机器都可以使用相同JMXServiceURL的正常连接到此ActiveMQ服务器的JMX功能，ActiveMQ服务的JMX功能正常开启。
    public static void main(String args[]) throws UnknownHostException, IOException
    {
        JMXServiceURL url = new JMXServiceURL("service:jmx:rmi:///jndi/rmi://128.128.17.1:2011/jmxrmi");
        String username = "guest";        String password = "guest";        Map env = new HashMap();
        String[] credentials = new String[] { username, password };
        env.put(JMXConnector.CREDENTIALS, credentials);
        JMXConnector connector = JMXConnectorFactory.connect(url, env);
        connector.connect();
        connector.close();
    }
代码在执行时，抛出异常：
Exception in thread "main" java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: 
java.net.ConnectException: Connection refused
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:601)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:110)
at javax.management.remote.rmi.RMIServerImpl_Stub.newClient(Unknown Source)
at javax.management.remote.rmi.RMIConnector.getConnection(RMIConnector.java:2327)
at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:277)
at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:248)
at SyntaxMain.main(SyntaxMain.java:24)
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.<init>(Socket.java:375)
at java.net.Socket.<init>(Socket.java:189)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595)
... 8 more
明明我连接到的是128.128.17.1 IP上的ActiveMQ的JMX，但是却提示连接127.0.0.1时被拒绝。有大神给个提示不？此生感激不敬~！