AMS 5.0 Professional Multipoint Publishing Stops After A Few Minutes

We have an instance of AMS 5.0 Professional installed and we are trying to use it to republish our stream to YouTube. But after just a couple minutes of streaming the stream stops. Not seeing anything unusual in the log files. Below is a copy of the main.asc file.

// Called when the client publishes

application.onPublish = function(client, myStream) {

  trace(myStream.name + " is publishing into application " + application.name);

  if (application.name == "YouTube/_definst_"){

  var nc = new Array();

  var ns = new Array();

  nc[0] = new NetConnection();

  nc[0].connect( "rtmp://a.rtmp.youtube.com/live2" );

  ns[0] = new NetStream(nc[0]);

  ns[0].setBufferTime(2);

  ns[0].attach(myStream);

  ns[0].publish("pubpoint1", "live" );

  ns[0].onStatus = function(info) {

            trace("Stream Status: " + info.code)

            if (info.code == "NetStream.Publish.Start") {

                trace("The stream is now publishing to Primary YouTube.");

            }          

        }

  nc[1] = new NetConnection();

  nc[1].connect( "rtmp://b.rtmp.youtube.com/live2?backup=1" );

  ns[1] = new NetStream(nc[1]);

  ns[1].setBufferTime(2);

  ns[1].attach(myStream);

  ns[1].publish("pubpoint1", "live" );

        ns[1].onStatus = function(info) {

            trace("Stream Status: " + info.code)

            if (info.code == "NetStream.Publish.Start") {

                trace("The stream is now publishing to Backup YouTube.");

            }          

        }

  nc[2] = new NetConnection();

  nc[2].connect( "rtmp://cnmediav1.xxxxx.org/live" );

  ns[2] = new NetStream(nc[2]);

  ns[2].setBufferTime(2);

  ns[2].attach(myStream);

  ns[2].publish("livestream", "live" );

        ns[2].onStatus = function(info) {

            trace("Stream Status: " + info.code)

            if (info.code == "NetStream.Publish.Start") {

                trace("The stream is now publishing to Internal server.");

            }          

        }

    }

}

application.onUnpublish = function( client, myStream ) {

    trace(myStream.name + " is unpublishing"  );

}