I think you should leave all this and buy a new memory card but if you have a lot of very important memory on the memory card then you should go to the place you got your memory card and then ask them for help.But most probably all the memory will get deleted! I am telling you this because of experience!! But if anyone has any idea how to get rid of this password without losing the data and without going into that mmcstore(because you know it actually does not work.That file explorer cannot access the files of a locked memory card.) If anyone has any idea how to unlock a memory card of Nokia 7230 (java.And if you want to know its system specifications then please search it in Google!!). I have very valuable data on it which I can never get back whatever I do!!
-reply by neeraj bsk