[quote name='alex1136']Is anyone haveing problems redeeming the code. Mine says:"The code cannot be redeemed because the offer is not available in your region, or the offer has expired."
I think the region I use is the US, but I think that the codes they issued must be for Ireland or something!! :S[/QUOTE]
I'm pretty sure they're cross checking your IP and your account's address.
They've done this before with DLC for Gears Of War 2.
So a US account won't work for someone with who's IP indicates he's in the UK, or even in a different state than specified in his account info.
You'll have to connect the 360 to a VPN using your computer in order to bypass that.