I had this problem all through beta and after on Win 7 64 bit. I tried about 6 different wireless routers with the same result. 4 different wireless cards with the same result. I tried wired and it worked fine. I finally bought a netgear device that plugs into the wired port and connects wireless mostly used for Xbox 360 and other devices, but so far so good. No more R0. Networking is definately strange with Win 7 64 bit with this game all other games are fine I used to play.