Black / Blank Screen on client, but remote control works

[Marco Gabriel]

Hi,

I have a problem on one machine running a VNC 4 server.

I connect from a client and can control the server (I see the mouse 
movement and so on), but I don't see the screen contents on my viewer. I 
only have a black / blank screen. I can see many other servers from this 
client without problems, only this one server doesn't provide his screen 
anymore.

I reinstalled RealVNC4, tried TightVNC and UltraVNC as well, I deleted 
every registry key that had VNC in the name and tried to reinstall 
without success.

Any hints for me? I don't know what I could check else...

regs,
Marco