Cant even play

When I try to play a match, it tells me to log in to Game Center. But once I log in, it tells me to log in AGAIN once I click start.. This goes on in an endless loop. Apparently this happens to a lot of people who have iOS 6. So if you have that iOS, dont even bother buying the game

iBuyAppsAllTheTime about Critical Missions: SWAT, v2.62g