Casio CZ/ VZ/ FZ - Pro Series

Hey Guys !

Well I finally found an RA-3 RAM cart for my CZ101 on eBay for auction 
and miraculously I won it (I NEVER win the auctions!). But now that I 
have it I can't get it to save anything. I follow the original 
instructions for saving (they work fine for internal memory) and 
after "Write OK" the "cartridge" light is on and the sound plays on 
whatever number patch I put it on until I change to a different number 
(with static only for sound) and when I return to where I saved it's 
gone back to static. I've done it several times with the same results. 
I bought a new battery for the mem. cart., same results. Am I missing 
something here? If anybody can help I'd really appreciate it!!!

Thanks,
the dog