when moving the files from MMC card, are you removing the MMC card from phone and use a MMC reader in PC to read the MMC card or do you have a cable that you connect to phone and to PC ?
If you have the cable, when you connect the cable there is a quesiton popping up in 6230i phone screen asking something like "do you allow data transfer" ?
If you answer "yes", your MMC card will be visible in Windows Explorer view as removable disk
But if you select "no", then PC Suite (if you have installed PC Suite to your PC) will load the PC Suite USB drivers to your PC and then you will have the PC Suite functionality in use. It allows you then to access the folders and files in phone memory