sd card error in dsi any ideas whats up with it ?

Hi i have a new dsi and i have just been exploring it and realise it has a slot for an sd in the side of it for memory expansion and ease of tansferring files to the p.c.i have got a 2gb micro sd in a sd card adapter and put 20 mp3 files onto it but when i turn it on and try to go into the sd to play the music it says 'The device inserted in the sd slot can't be used'
im not sure if it has to be an actual sd without an adapter?
has anyone else had this problem with one?thanks for any help on it ,happy new year to all!

Try formatting the sd card and then put the music files in a folder named music and see if that helps.

Make sure the audio files are in ACC format and format your card. If that doesn't work you could either
A)Buy a regular SD card
B)Install moonshell on your AK2i and listen to your music that way.Best Regards,
SoulRunner

yeah. you can use any audio converter or itunes for this purpose as well.