I've just bought a copy of Mass Effect 2. I put it in and downloaded an update. Now, whenever I try and play it I can't sign into Xbox Live. Every other game I have is fine, so it seems to be something to do with either the game of the update. I've searched the net but found no concrete work around for this. Please can someone let me know how to fix this as it's very very frustrating.
Any advice would be greatly appreciated.