Shooter 2D: Character animation only runs once

Questions & Answers
1

I wanted my animation to play whenever my character shoots the gun but currently the animation runs only when it fires the first time and not the others. I have the impression that it will be something very simple in the code but I have been around here and still have not found a solution. Can someone give me a hint, please?

Here is the animation part in the code:

    private Animator myAnimator;
    private bool isFire;
    private string FireAnimHash = "isFire";

    void Awake()
    {
        spriteRend = GetComponent<SpriteRenderer>();
    }

    void Start()
    {
    myAnimator = GetComponent<Animator>();
    myAnimator.enabled =true;
    myAnimator.SetBool (FireAnimHash ,isFire);
    }

    private void Update()
    {
    {
        AimArmAtMouse();
    }

        if (Input.GetButtonDown("Fire1"))
        {
          isFire = true;
          myAnimator.SetBool (FireAnimHash ,isFire);
        }
2

If anyone needs to know…i resolve the problem using Trigger instead of Bool…