Pokemon White ROM Cheats not activating?

I'm using an acekard 2i to run the Pokémon White hack "Volt White."

I want to use the cheat codes function, and it has many in there for me to select. I chose the codes I want, but every time I boot to the game, they're not activated. It works for other games (such as HeartGold), but they won't activate on Volt White. I've tried pressing Select+Start+Up, I've tried rebooting the game several times, rebuilding the database, etc etc. Nonetheless, it won't work.

Will it just not work because it's already a patched game? Or is there something I can do?