Forum:Help with activing the dlc thanks

I have finished bioshock 2 and downloaded the Minerva's Den, The Protecter Trails and the rapture Metro DLC. I have restarted the game ( turning Xbox off andon and then loading the game ). But when i come to the menu ( Single player and Multiplayer ) none of the DLC is showing at all, i was woundering if there is some special way to active all the DLC or should it just be showing as soon as it is downloaded.

Thanks for the help.