My brother and I play a lot of Call of Duty: Black Ops, so we've taken turns buying the DLC map packs. (We use the same console) We had been using a USB flash drive for memory purposes, but then I bought a bigger one since we ran out of space. I moved everything over, but for some reason the First Strike map pack wasn't working. This went on for a while with me procrastinating on figuring out what's going on.
I tried deleting it and re-downloading it (it's on my brother's account) several times but it didn't work. Just now I figured out that it does show up if my brother's account is signed in, but not mine. This was not the case before; I played the First Strike content plenty of times on my account alone with no problem. What's going on?