How to make wemod cheats work in Assassins Creed

Hi I am trying to play the original “Assassins Creed” (Via Steam, on a PC), I want to try for every achievement but I can’t do that without cheating. So I fired up Wemod and started the game from there… One of the most useful cheats, IMHO, is “infinite throwing knives” which should be activated by Numpad 3.
But no matter what I do, I never get any more than 10 knives, and I have to pickpocket them.
Is there something that I have to do to make it work? Like do it after a reset, or when my inventory is full or something? I’ve tried lots of things and I just can’t get it to work.