I downloaded the DLC for my xbox 360 game of bioshock a couple of months ago and preceded to play with it for a little while to see how the new sonic boom plasmid worked and then quit playing without saving... and since then I havent played at all.. now i went back to play and i can't get the new plasmids at all... i checked my memory and i still have the DLC on my harddrive...

Does anyone know what the deal is??? I cant figure it out and its pissing me off!!