Sansa e260 in MTP

Hi, I tried adding music to my Sana e260 and normally, I’m able to browse through all the files and delete mp3’s I no longer want. I would drag/drop mp3’s to the music/audio folder without any problems. But about 2 months ago, my computer stopped recognizing my e260 in MTP mode. When I change it to MSC, I’m able to browse all folders except the Music or Audio folder. I’m running Windows Vista Home and have tried everything I could find to fix the problem.

Any help is much appreciated.