Problem with Kingston minisd in nokia 6280

i've just bought a Kingston minisd card. I would use it in my nokia 6280, but the phone becomes very slowly when it is inserted and I can't put anything on it. It's only the phone that recognize the card. When I try connecting the phone to the computer I can't find the card. The phone works with my nokia 64mb card. I've tried formating the with the phone, but it still wont work.

Any good ideas