This is confusing. On earlier note Steve was in fact correct in identifying that the client isn't running. If it isn't then there is no way that the server will connect to the screen. If MagicInfo client isn't properly installed, then VNC won't be running either, and the only way to communicate with the screen is through RDP provided you know its IP address.
One more thing. You haven't changed the screen's OS, have you?
Bill