Ramman

I started experiencing this after an accidental format. Sonicstage recognize the device just fine and it transfers the files to the E103 without problems...the files are all visible when I browse the device with windows explorer. The problem is: when I disconect the walkman, it just says 'no data' and it won't play the files... Is there anything I can do to remedy this problem? Any help would be greatly appreciated. Thanks.