I am using transform local euler angles to reset the angle of an animated character when it hits the ground. It needs to be local as the character is a child of a rigidbody which follows the surface normal. The problem that I have is that it works sometimes and not others however it always recognizes the collision. I can not see any pattern to work out why. Here is my code:

function OnCollisionEnter(collision : Collision) {      
    var angle : Vector3;
    angle = Vector3(0,270,0);
    playerAni.transform.localEulerAngles = angle;
    print("collide");
}

Any ideas peeps, I am stumped... thanks :)