Computer will not recognize Clip (not Clip +) when it's in MTP mode

MP3 players Sansa Clip | Clip+
1

Computer will not recognize Clip in MTP mode.  The Clip thinks it’s connected, but nothing shows up on the “My Computer” side. I forced a MSC connection and that worked, but none of the music/playlists show up that way.  I know there is music on the Clip because when I use it with my head phones everything is there, and it plays.  I’ve tried updating to the latest firmware on the Clip, removing and re-installing the USB Mass Storage driver on the PC, Updated to version (v11) of Win Media Player, holding down the ON button for 30+ seconds (that did nothing but turn the Clip back off right away).  I’m out of ideas.  All I want to do is add/change songs on my Clip.  Any ideas???