Another Collision problem

Hi
I make a game with zombies what chase the player but then some off them track me they go 1 over the other and at the end i have 1 zombie
i tryed zombie overlap zombie--stop,bounce that dont work then i tryed zombie overlap zombie--add sin(angle("Zombie")-90)*2 to alterable value x
add cos(angle("Zombie")-90)*2 to alterable value y so the zombie is walking backwards that dont work too have some one an idee?
thx

Hello,
Is the event fired ? I mean try to add End The Application on the same event, test your game and if it closes when you collide the zombie, there is no problem with collisions.
Also, the two objects must be on the same layer to collide