Actually, I can see if it's pinging or not by myself, by opening a second Jazz2.exe and entering as client. And I still have the same problem: Sometimes it pings, sometimes it doesn't.

And ... if my IP is dynamic, what are the possible candidates when I open a port? However, I think it's static, since it ALWAYS shows up as 192.168.1.3

And ... There are External TCP, Internal TCP, External UDP, Internal UDP. Must they be all 10052 or all 10054? Or must they be all 10052-10054? Or must they be one 10052 and the other 10054?

Sorry for posting that much, but ... I'm almost there! It never even stopped pinging before today!