Question : Problem: UltraVNC Authentication Fails

I am new at using UltraVNC.  I like what I see and it will definately solve some of what ails me.  My issue is I get a VNC Authentication failed message between some computers.  I can go to another computer and connect to the same computer and I get in.

Does anyone have any ideas?

Answer : Problem: UltraVNC Authentication Fails

can you ping the machine from the affected pc as another network test