Playstation games on playstation2 memory card s

I just purchased a used copy of final fantasy eight and am using it on my sony playstation two.it is working fine but i am unable to save it the games on my hip gear memory card from the original playstation. psx 1 mb memory card. it will not save. it is showing on the screen " data is damaged" i also tried to use a play station 2 memory card it said something like it cant be read. what can i do ?