Same problem for me.The network I'm on haven't got any ports blocked for outgoing traffic
I'm on Windows 8.1 and according to Fiddler I can see that the application is making requests to your server successfully.
The log however says this:
------------Time:2015-01-21 09:18:52---------------
Function Name:RemoteWebSocket_OnError
System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond