i use vnc alot, but im not sure im clear on what youre doin... ill try....
you have a vnc server running on your win2000 box, and you can view that desktop from nix, right? but you cannot view your nix desktop from the winbox right? did you start the vncserver on the nix box? here is the usage if you havent started one yet
Code:
usage: vncserver [:<number>] [-name <desktop-name>] [-depth <depth>]
[-geometry <width>x<height>]
[-pixelformat rgbNNN|bgrNNN]
<Xvnc-options>...
vncserver -kill :<number>