I said this earlier, but for me, bridging my wireless connection with my LAN, and then using my wireless connection pre-dominantly fixed the problem, that being said, I do have to switch back to using my wired connection any time I wanna torrent or anything like that. I really think the issue is something to do with crysis 2 not accepting a wired connection.
http://www.youtube.com/watch?v=Fikv2DpZNWU&feature=related
This video did the trick for me, I just had to fiddle around with it for a bit. I will also note that i'm not on campus, I was having trouble with my home network
Hope this helps.