On Sims 3 What Do I Do If It Say My Serial Code Is Invalid Sims 3 Serial Code Invalid?

Sims 3 serial code invalid? - on sims 3 what do i do if it say my serial code is invalid

I tried to register on the site again and again, and I enter my serial code evertime my game, says that his patients and it is not? You do not know what happened to this, suggestions?