mp3 on DSI

Hello,
I have a acecard 2 for dsi.
I downloaded moonshell so i could play MP3 on it, but it says that the dsi doesn't play MP3
Does anyone if i could have done anything wrong.
I have Moonshell ds file in the DS map and for the mp3 in a mapPlease help me

Run the Moonshell.nds file. Choose the MP3 files, and it should play.

I downloaded again and now it does work, but the map that moonshell opens has a limit of 255 files,
Is that normal?

Probably.Organize your files into folders so you have less than 255 in each folder.

Usually it's just a limit of arrays recorded in libfat.