UnitySocketIO-WebSocketSharp hangs on a handshake loop using Unity webplayer

I'm using UnitySocketIO-WebSocketSharp to connect with a node.js server. If i run the app on Unity3D in standalone mode, everything goes well; the handshake happens normally and the websocket runs smoothly. But, if i run in webplayer mode the socket just gives me an eternal handshake loop.

The code i'm using on Unity is exactly the one from the example. On the server i'm using a crossdomain.xml, and this is what i'm using as the server

Here's the output from the server. The blue arrow indicates the moment i play the Unity scene: