VNC and Windows 7 64Bit

Does anyone have any recomendations for a VNC client that works on Windows7 64BIT? I have tried TightVNC and ultra VNC but havent been able to get them to connect to a client. Need something that runs as a service or and doenst loose the connection when someone logs off

cheers

Rdp?

I'm certain that I used UltraVNC for this purpose.

Yeah i have used uVNC aswell, worked fine :)