i just uplaoded some songs onto my minidisk, but then when i tried to play it all the songs were gone and it said BLANK disk. so i put the same songs onto another minidisk then the same thing happened all over again. its like all the songs were deleted but i didnt press delete. its not my minidisk player because it still plays all of my other disks. does any one know what to do? has this happened to anyone else before?