I bought this game, played campaign, Sweet! I just started playing it in Post - Human .

So okay, Campaign is great, PC can run graphics on Xtreme, so good so far.

Then I hit multiplayer..

I couldn't finish ONE game yet. 5 minutes into the game and I get disconnected, with the error message being:
The connection to your opponent have being lost! Exiting Multiplayer.

WHAT THE HECK IS UP WITH THIS?!?!?!

This happened to me with C2 and BC2. What I did was to turn on DMZ on my router and it work like a charm!