Micro SD card crash

My 8gb Muse crashes when trying to load music from the Micro SD card. I have the latest version of Songbird, the latest player firmware, and I loaded the songs onto the Micro SD card via songbird. The songs are on the card, but the player freezes on start-up. The player works fine when the Micro SD card is removed.

Can anyone help?

Have you tried using the Micro SD card on any other device? Do you have any other MP4 olayer you could test it with, to exclude whether it's not faulty.