not working

Ever since the xm25 glitch update i haven't been able to play Mw3. It keeps saying error code 21024 when ever i click on multiplayer. if any one has a solution plzz reply to this. :yesnod:

Hi! When I put my SD card into the Wii, it says: "The SD card cannot be used" or something along those lines. My Wii came like this, but I always thought it was the card, until my friend brought over a Nintendo brand SD card labeled "Wii". That didn't work. I have tried formatting, and that...