Using No$GBA cheats

i put the cheat in, press AR, but it doesnt load.
Why?

Make sure that the cheat is checkmarked, then you have to go to File>Reset Cartridge or else the cheat won't take effect.You have to do this every time you start the game because when you close the emulator the cheats deactivate. So open your game, enable the cheat and reset cartridge.