So i recently got and finnished the single player of Uncharted 2. After going trough it again just to find some more treasures and get some more trophies i tought it was time to try the multiplayer. So i start a game and i do pretty good, get 7 kills but then i get CONNECTION ERROR. And all my progress was for naught, my ass kickery was washed away.  
 
First i tought huh well probably wont happen again. Well i was wrong, i have tried many times but this just keeps on happening. So i tried too google this problem and it seems it has something to do with my Router settings.... and i dont have acces to the router, one of my neighbours does. The net here is shared over 3 apartments and the one that has the acces is serving in the military.  
 
I tried all the other "fixes" i could find but the problem is still there.... makes me a bit sad for the little i did get to play of the multiplayer was really fun and i do well in it. And on top of all this, everytime i try to play the game think i left on purpose and gives me the 10,000 dollars penalty.  
 
So i ask of you GB comunity. Is there anyway to fix this? i would really apriciate the help. 

Shit. I'm not sure. Rest your internet connection and try again. Or contact Naughty Dog. Seriously, it works just fine for me.

Must be your NAT type I think. A complete and utter nuisance that I still haven't managed to completely tweak so I can play online flawlessly without a few dozen ''connection error'' notices. It's NAT type 2, yet it's still labelled as ''strict'' for most games.