Help...........Problem of Nokia 6230.

Hi experts,

Can anybody tell me, why my card reader cannot read my oringinal MMc card??

Is it a password for my MMc card, coz when i put it to my friend's Nokia 6600. It ask me to key in password? If yes, what is the password?

Is it the caller group function usable??Every time i enter to it, it will automatically jump out to the function mode.

Thank you.