GameShark codes in backup games

[magnificint]

Hi guys, I have a GameShark 1.9 and I know for fact that you can use codes with backup games but when I try to use 2 codes on Blood Omen 2 ( Kain upgraded and target gift jump ) the game freezes loading the memory card and if I use only 1 code the game loads ok.
My question is, if this common ? because I had to reset to default settings a couple of times before the GS2 let me save the codes, maybe my GS2 dongle is damage, does someone know ?

Thanks