[FreeNX-kNX] New user: Problem connecting to existing vnc server

[Michael]

Hello,

I am trying out freenx/nx because of several positive reviews I have seen.

I am running FC4 on my computer with KDE using its built in rfb 
sharing.  I can connect fine using real vnc or tightvnc.

I installed nx-1.5.0-14.rhfc4.at and freenx-0.4.4-6.rhfc4.at from ATRPMS.

On the client side, I am using the NX client for windows 1.5.0-138

If I try to connect to KDE or GNOME sessions, everything seems to work 
fine and new sessions are launched.

When I try to use RFB to connect to the localhost:0 display, I always 
get this error:

The login to the VNC server failed.  Please check the username and 
password you provided and retry.

Any thoughts I what I might be doing wrong or things to try?

Michael