We discussed this before on here somewhere..
Some people said the codes would only work if they started the game and then transfered the cheats in.
Others like me use the codes the other way by sending the codes to the plugin then starting the game.
Make sure you try both and see if that works
sorry gunblade but u r wrong as I just tried it.
I started tekken 3 and started a battle and lost some health,then i escaped and started pec and chose the infinite health option and transfered the data ok then continued and my health went back to max....
So it does work ...