Please trying using the method that I have been using for this kind of problem.Before putting the mmc card in the card reader slot, cut a sheet of slightly hard (not very hard ,dear)paper, of the size of mmc card and put it in the card reader. Then put the mmc card inside the card reader slot,(but below the surface of the paper that you have just put in.) Then open the memory card (in your pc)as usual. Now you will be able to copy paste on the mmc.Please tell me if you have succeeded or not