Gameshar 4.1

[Blindsighted]

I am trying to use my Gameshark 4.1 with backed up ps2 games. It plays game just fine when I am not loading the gameshark first. but when I use the game shark select the codes I want for the game and then it asks me to insert the game with is a back up it says cannot load game. is there a fix for this or am I SOL when it goes to trying to be a cheater =)