finally I found the bug it was the chainsaw zombie don't know why but he creates a problem in the game
i saw the fbe file and the paths for the soundset and the script were correct so i don't know why the F don't work
but with big problems comes big solutions and i just remove the zombie of the game
after days of headache problem resolved
if anyone knows the solution to this entity (chainsaw zombie 1 and 2 ) please tell me