I been playing since the beginning. I have pc and ps3 sub but i rarely play on PC. Everytime i try to log in today i get

"Cannot launch FINAL FSNTASY: A Realm Reborn. Please register the promotion code included with your package or download. A re-install will not be necessary. "

I been paying on this PSN and Playstation for well over a year. Why do i get this error now?