pc cannot see the music in the sasa clip device

I have loaded music on to the sansa device over the years from different computers.  Now when I plug the device into my laptop it detects the device but it can see no music in any folder.  Folders are there but empty.   Music is in the device, i can listen to it fine with headphones and it desplays fine in the sansa screen on the device.  But it shows no music on the laptop.  I have the latest firmware and I have tried the msc v mtp thing and nothing either way.  Any more ideas?