(adsbygoogle = window.adsbygoogle || []).push({}); Hey guys!

Some days ago I bought a xBox with MW2. The first two or three days i played online against my friend and it worked all perfect. Also the chat worked. Then after two or three days suddenly it didnt work anymore, also the chat or the party. Now also ist needs very long to find some people in public lobbys (about 10 minutes!). My NAT-Type on xBox: Open
I just have MW2 also at my PS3, there ist works perfectly! But there my NAT-Type is: Moderate

Do you have an idea why it doesnt work?