Try disabling soft-reset and the AP fix for that rom only. Keep everything else default.
If it doesn't work, try reformatting your SD card and reinstalling AKAIO. Hope it works
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan