Jmeter小白，想使用JMeterPlugins 监控远程linux的系统资源，如Memory，CPU等，本地插件已经配置完成，远程linux也已成功安装startAgent，并也成功启动，客户端和服务器之间也可以相互ping通，但是添加到本机进行监控执行jmeter时，报错如下，求高手指点：
2015/11/12 10:52:17 INFO - jmeter.engine.StandardJMeterEngine: Running the test!
2015/11/12 10:52:17 INFO - jmeter.samplers.SampleEvent: List of sample_variables: []
2015/11/12 10:52:17 INFO - kg.apc.jmeter.perfmon.PerfMonCollector: PerfMon metrics will be stored in C:\Users\ADMINI~1\AppData\Local\Temp\perfmon_5552909499068635145.jtl
2015/11/12 10:52:38 INFO - kg.apc.jmeter.perfmon.PerfMonCollector: Can't connect TCP transport for host: /192.168.3.12:4444 java.net.ConnectException: Connection timed out: connect

at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at kg.apc.perfmon.client.TransportFactory.TCPInstance(TransportFactory.java:91)
at kg.apc.jmeter.perfmon.PerfMonCollector.getConnector(PerfMonCollector.java:243)
at kg.apc.jmeter.perfmon.PerfMonCollector.initiateConnector(PerfMonCollector.java:228)