I have a 360 with one controller, I am at a party with 3 other controllers. Two controllers synced perfectly with the 360, but one doesn't. The circle around the xbox logo just blinks, then I push the sync button on the 360 face and then the one on the controller, but they dont recognize each other. I heard that there can be interference from other wireless devices and phones, but I moved the xbox to a whole different room and it still won't sync. Does anybody have any solutions?