strange problem

["Stéphane Seignovert [FXM]"]

Hello everybody,

here is my problem.
I used to connect everyday to 4 computers (on the same network with the 
same IP) via VNC. Everything worked fine until yesterday when I lost 
connections to 3 computers.
Only one computers can be reached. For the other 3, I get the following 
message: connection timed out (10060).

I have checked everything: ports, local IP adresses: all are the same as 
previously.

I have checked my computer and found nothing which could be a problem.

Remember that one pc can still be reached.

I have now tried with another computer, and all 4 computers can be 
reached. Quite the same configurations on my 2 computers, with Mcafee 
and VNC ist authorized.

Any help welcome!

Stiphane