How do you "resync" a 360 controller? Seems like I had it down for a while and then it lost it again. I charged it to full when I was playing ME2, but now it's back to only working while plugged in (It even show full charge). And when I pull the cable out, it loses sync. I pressed the red button on the 360 to resync it, and it seemed like it work for a few seconds, then it went blank until I plug it in. I thought it might have been the battery on the controller, but it was workin in top shape (for hours) recently. I know I tried to sync it to my PC for a while, but that was before ME2. So what is the appropriate way to resync your controller to your 360, so I know I'm doing it right?