NoVNC code: 1006 error message

[Alejandro Lengua Vega]

I created a Windows 2008 VM over a freshly installed Proxmox 3.3-1 server
and after some minutes of working perfect I got a Server disconnected (code: 1006)
error message and since then I couldn´t connect to the server.


So had to reboot the host server to regain access to the VM, why?