ARhh its soo doing my head in! So i baought the game of the year one today (brand New) inside it has the little piece of paper saying the keycode on it. So i out in the jeycode on the piece of paper into the market place but it doesnt work. I then read the instruction and see tht i have to go on the website to get a market place code, so i do tht and now when i enter the new code it says, ' This code isn't valid. Please enter a valid code.' wht should i do please?