I created an Xbox Live account online before I owned the 360 and before I ever played online. I recovered my gamertag successfully but I can't play anything online. Gears of War...Halo 2 or 3...nothing. I can use my roommates profiles fine so it's not the parent settings (of which none were ever set up). Are there any thoughts on how to resolve this? I can use the marketplace and download stuff just fine but I can't play online.