Connecting Socket.IO and Kryonet, connected, but timed out during TCP registration

Question

I have a nodeJS server setup to accept socket connections, this seems to work fine with my web applications.

Now I'm trying to setup the same server to accept socket connections from Kryonet library on Android, iOS(Though RoboVM) & Desktop.

Node setup:

gameserver.js

var server = app.listen(9999, function() 
{
    var host = server.address().address;
    var port = server.address().port;
    console.log('Gameserver listening at http://%s:%s', host, port);
});

//Socket IO stuff.
var io = require('socket.io').listen(server);
require('./live_game_api.js')(io);

live_api.js

module.exports = function(io) 
{
    io.sockets.on('connection', function(socket)
    {
        console.log('user connected to server.');

        socket.on('test', function(msg){
            console.log('message: ' + msg);
        });
    });
}

Then within my app I've got:

new Thread(new Runnable() {
                @Override
                public void run()
                {
                    try
                    {
                        Client client = new Client();
                        client.start();

                        client.addListener(new Listener() {
                            public void connected(Connection connection) {
                                PolyUtils.log("Connected");
                            }

                            @Override
                            public void disconnected(Connection connection) {

                                TextNotifierController.getInstance().displayTextBottom(UPStrings.Disconnected_from_mothership);
                                super.disconnected(connection);
                            }

                            @Override
                            public void received(Connection connection, Object object) {

                                PolyUtils.log("received:" + connection.isConnected());


                                super.received(connection, object);
                            }

                            @Override
                            public void idle(Connection connection) {
                                super.idle(connection);
                            }
                        });

                        //192.168.1.11:9999
                        client.connect(SOCKET_CONNECTION_TIMEOUT, ServerController.SOCKET_DOMAIN, ServerController.SOCKET_NUMBER, -1);

                        Gdx.app.postRunnable(new Runnable() {
                            @Override
                            public void run() {
                                setupSocket();
                            }
                        });
                    }
                    catch(Exception exception)
                    {
                        Gdx.app.postRunnable(new Runnable() {
                            @Override
                            public void run() {
                                hasConnection = false;
                                TextNotifierController.getInstance().displayText(UPStrings.Error_connecting_to_mothership, TextNotifierController.nearBottomVec);
                            }
                        });

                        exception.printStackTrace();
                    }
                }
            }).start();

I get the following error when connecting on the client:

00:00  INFO: Connecting: /192.168.1.11:9999
java.net.SocketTimeoutException: Connected, but timed out during TCP registration.