Playlist problems with Sansa Clip

Environment -

Sansa Clip 4GB, Windows 7, WMP 12

I created a new playlist on WMP, put all relevant files there, and verified I could play it well on the PC.

I added it to the sync list of the Sansa player and pressed Sync, songs were copied, but the plalist not.

I couldn’t find the playlist anywhere on the device,  and could not find it in the “playlist” section.

In addition - how do I see and edit the “on-the-go” playlyst of the clip from the PC ?

I am complely new to Sansa, and tried to follow suggested solutions in the forum, but none seemed to help.

Thanks in advance !