Fuji Xd Card Initialize Olympus XD Card For Fuji FinePix?

Initialize Olympus XD card for Fuji FinePix? - fuji xd card

I have a Fuji FinePix A510 and Olympus xD Picture Card. It worked for about 2 years. At Christmas last year I have a new camera and have let my sister my old Fuji. He put some pictures on the computer, and when he put the card back, "says not initialized. Can someone tell me how to solve this problem, or am CET, a new card from the camera?
Thank you!