Digimon World DS Freezes

This was becoming a very good game until I tried to digivolve ANY of my digimon and every time I try it freezes?Anyone know how to fix this? Im using an Acekard 2, with the newest version.
I really wanted to keep playing but what's the point of I wont be able to digivolve any digimon.This was the Rom link.
https://www.romulation.org/NDS/0663_-_Digimon_World_DS_(U)(Legacy).rar.html/

Are you using any cheats?Have you tried the alternate firmware for the Acekard, AKAIO?

Replying to #2

I am not using any cheats. and I didnt know there was an alternate firmware for Acekard called AKAIO.

You should try using it.