manjidude

Ive just recently got a NW-E407 1gb sony mp3 player but am having a problem with transfering a playlist. Ive created one playlist with all my songs for the mp3 player and ive set it up to transfer automatically whenever i plug the NW-E407 in. But whenever i add new songs to the playlist and plug in my NW-E407, SonicStage deletes my whole playlist from the NW-E407 and retransfers it again now including the new songs. Is there anyway to stop if deleting all the songs from the playlist which are already on the NW-E407??