Kingdom Hearts Re:coded - status matrix freezes game at certain panels

When using the Status Matrix to set panels, when I unlock the Prize Cheats board (visible after reaching Olympus), the game freezes up. The board lights up, then after the message "Prize Cheat activated!" appears, another message window pops up, but is a blank black message, and the music freezes, as well as everything else. I'm using AKAIO 1.8.1, and using the rom in this thread. No cheats are activated. Anyone know what's wrong?