sync playlist

[MnInShdw]

I use MM to sync my S series walkman.

the sync process ends successfuly but it seems that walkman doesn't recognize the playlists.
when I access the playlist nothing shows up (accessing playlist folder in explorer shows the playlists)

windows 8
MediaMonkey 4.07.1511
windows media player 12.0.9200 is installed
created playlists are m3u


any kind of help is much appreciated.