Quote Originally Posted by imed View Post
That's the first I did.
It might be the bad Communication card, so I'm waiting for the new ones, will see what
happen.

Ok guys. The problem has been solved: the ComCard in one of machine appears to be no good as well as the ComCard in my PC. In addition to that when I tried to bypass the switch box, the existing Null Modem Adapter didn't work and was replaced with a different one. And most possible that is a result of a light strike.
I'm very appreciated to everybody who posted their suggestions an advises.