M3U playlists not working from micro SDHC card

SanDisk MP3 players SanDisk® Clip Jam
#1

Hoping someone can help with this one:

  • I have M3U playlists working fine from the ClipJam’s internal memory

  • however, M3U playlists from the micro SDHC card will not work. I have the audio files saved in the same folder as the playlist on the card, but when I select the playlist with ClipJam it gives the message “File format not supported!”

Thanks in advance.