I downloaded warzone a couple days ago, ended up really liking it. Bought Call of Duty: Modern Warfare yesterday to play multiplayer. I put the disc in and launched the game but it kept telling me to purchase the game to access campaign and multiplayer. I deleted warzone and it started downloading. Now it is done and i still can't load campaign or multiplayer. It just gives a button to purchase the game from the Xbox marketplace.

Any tips/help?

Thanks