So i got my Pre-order code few days ago on PC and i have registered it without any problems.

But when i try log-in the game i get this message.

No valid or active service account is available to play FINAL FANTASY XIV: A Realm Reborn.

Proper registration through the FINAL FANTASY XIV: Mog Station is required.

* Users participating in early access must also complete registration by August 30, 2013. Using the code enclosed with your package, please complete registration through the FINAL FANTASY XIV: Mog Station.

Even in my SE accoint it says i have registered FFXIV: A Realm Reborn.
But the clien still thinks i don't have the FFXIV: A Realm Reborn registered at all.