UltraVNC

sorry, i use UltraVNC not RealVNC.

thanks mattice for your repons.
I don't use the noreg version but i use MSRC4plugin.dsm, and i get this error only from client, on server is all ok.

I have the last one RealVNC, I've try to use the MSRC4plugin.dsm, I've copyed the plugin on the same path where is WinVnc server and viewer but when i try to configure id i get this error:
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Trying to find the key file:

Cheching ...