One computer (XP) just refuses to connect and displays the "Negotiate protocol version". The are a lot of postings on that here. No silver bullet.
I've got three computer (all XP). The problem computer is on 192.168.0.13 (computer "C").
The router is told to use port 5600 on that. Computer "B" is on 192.168.0.11 and port 5700 and works ok. All runnin the 1.0.9.5 UVNC.
I am not using it as a service and I don't use any DSM plugins.
Ping works great to "C". I also tried PChelpware in "C" and it works great there. Since PCHelpware and ping work and I can access "C" otherwise my router/port/network/firewall settings should be OK. My firewall in all computers is Zonealarm.
What can I try next?