i had that same problem (I get alot of problems with the game... lol.) Anyway, if you have any hacks (for example, cheatengine and the vip and public hacks) you need to get rid of ALL of em.
then you MUST reinstall the game DON"T RUN IT YET UNLESS THE HACK TELLS U TO!!!
then, just put the files where they need to go and it should work.