Hello all, this is for everyone which gets this error.
Step 1: Download the fixer program and open it. (Program in attachment)
Step 2: Launch Black Ops 2 Multiplayer.
Step 3: Press the button "Fix this" in the fixerprogram, while running BO2 in the background.
Step 4: Open the game.
Step 5: Go to Barracks -> Prestige Mode -> Click Prestige Mode -> Click Learn More -> Click Enter Prestige -> Doubleclick Prestige Awards -> Doubleclick Fresh Start and finish it.
Step 6: Join a server!
Hope this helped everyone which had a problem. If it helped you, you can give reputation or thank me in a post, only if you want to.
Owning but i dont have prestige mode in my barracks
Then you must use a levelcheat, for example mine but its not approved yet, so wait for it to be approved, then use it to get to highest level so you can prestige, then prestige will be open for you, then you can do it.