Thanks for your replies guys.
Husky,the infinite health cheat is as Greensabre13 said "baguvix".
BUT,that doesnt work me either.
Thats another weird thing.I am reall amazed with this vague problems.
I still hope someone can help me solve this.
And Greensabre13,yes if you have a good trainer with lots op options like the
GTA-SA Crazy Trainer +151 or GTA-SA +113 Trainer,you dont have to type in the cheats
yourself.It is then just a matter of pressing mostly 2 buttons at the same time.
Only,in my case,the infinite health "2 buttons" cause the game to crash since a short while.