I bought the pc version today since i didn't enjoy playing it on the ps3. I looked it up before i bought it and it said that you can have pc and the ps3 system registered to play with your characters on the ps3 also on the pc. But when i have signed in to my Square enix account when starting the game and typed my registration code, it won't work. Anyone knows what kind of problem it is and how to solve it?

Help is very appreciated