Ahhh, I think you may be having the same problem I had. I am running RealVNC server and had to enable (or maybe disable) 3.3 compatibility mode. I don't think the VNCviewer on the N800 supports the listening mode protocol, it uses the default port 5900. I have had it working with TightVNC, but not using the "listening" server protocol. After I discovered the 3.3 compatibility mode solution I stopped using TightVNC. You may want to verify the username the server is expecting since the viewer doesn't prompt you for one, only the password.