i don't now what to do ???

Hi !
I play fifa 10 on xbox 360.My problem is virtual pro. Whenever i play manager mode and finish a match, were my virtual pro play's, it freeze's because it can't unlock the achviment for 100 games played wuth the virtual pro. I have no hard scratche's , I bought the game just when it where realsed. I live in norway. ??????????????? :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :) :)