Sorry for the late reply on this. I don't seem to eb getting reply notifications for this thread.

It appears that the server is not allowing you to forward the connection. consider the following:
  • The version of Windows you are using.
  • Is the VNC software actually listening on localhost port (5900). It may only be bound to a physical interface. To test simply try to connect to VNC from the machine it is intalled on with localhost:5900. If it works you'll see images of Windows cascade acroos the VNC screen.
  • Do you have Windows Firewall enabled. It may be blocking the connection so ensure you have port 5900 open to the loopback subnet 127.0.0.0/8.