getConnection() return null

[JohnPekl]

I tried to run the example from here. (http://lorenwest.github.io/node-monitor/doc/classes/Monitor.html)

Though I received data from Server periodically, the function processMonitor.getConnection() return null.
Also, the function processMonitor.control('ping', function(error, response), return null due to the error [ERROR] Monitor.control.Process.ping - Probe not connected

server.js
`var Monitor = require('monitor');

var options = {
probeClass: 'Process',
initParams: {
pollInterval: 10000
}
}
var Probe = new Monitor.Probe(options);
Probe.onControl('ping', function(error, response) {
response = 'asdasdasd';//console.log('Ping response: ', response);
});

var server = new Monitor.Server();
server.start();`

client.js
`var options = {
hostName: '192.168.2.3',
probeClass: 'Process',
initParams: {
pollInterval: 10000
}
}
var Monitor = require('monitor');
// Connecting a monitor to a probe
var processMonitor = new Monitor(options);
processMonitor.connect(function(err) {console.log('aa', err);});

//var Connection = Monitor.Connection(options);

// Monitoring the probe
processMonitor.on('change', function(){
console.log('Changes:', processMonitor.get('freemem'));
});

// Remote control
processMonitor.control('ping', function(error, response) {
console.log('Ping response: ', response);
});

console.log('getConnection()', processMonitor.getConnection());`