animation clip wont play

I have a problem with my animation Clip which is supposed to play when his health is <=0. but all it do is stop running and give me a death point which it’s supposed to do. my other animation Clips work fine.
here’s my code, it’s in C#

public AnimationClip dieClip;
public AnimationClip idleClip;
public AnimationClip runClip;
public int moveSpeed;
public int rotationSpeed;
public int maxdistance;
private bool dead;

void Update () {

		
	if (health > 0) {
	moveSpeed = 3;
	rotationSpeed = 5;
	animation.CrossFade (runClip.name);
	Attack ();}

	if (Vector3.Distance (target.position, myTransform.position) < maxdistance) 
             {
		animation.CrossFade (idleClip.name);
	     }

private bool isdead(){
		//bool dead = false;
		if (health <= 0 && !dead) {
			moveSpeed = 0;
			rotationSpeed = 0;
			animation.CrossFade (dieClip.name);
			dead = true;
			StartCoroutine ("enemyDead");
			collider.enabled = false;
			scoreManager.kills += 1;
			scoreManager.killsCoins += 1;
				}
			

		return dead;
	}
}

@CodinRonin if (Vector3.Distance (target.position, myTransform.position) < maxdistance && !dead) { animation.CrossFade (idleClip.name); }