strangely, I fixed this by dropping in .mp3s of all the music, I didn't think this was supposed to work, but it did. hooray!

I have everything working well on my DS - I am going to be on an 8 month tour with a puppet show soon, so I'm am over the moon at being able to play a couple of old favourites and neat looking new (old) games for the first time! BASS looks really impressive. Everything I've tried works great, except...