I’ve had a Fuze for awhile now, and have been able to create playlists through Windows 7 media player and sync them, but when I try to do it now, it syncs but the playlist doesn’t show up. If I open the player as a file, the playlist is there, but it is not available when you go to “playlist” on the menu. It doesn’t seem to matter which USB mode it is in.
If you are in MTP mode, you should be able to create playlists through My Computer, or through Windows Media Player, but I imagine you knew that already. However, you can also create playlists through Video4Fuze (see my signature), if the player is in MSC mode.