whay isnt this code working?

Question

well i made this code folowing a FPS multiplayer tutorial and i cant get whay its now working!!! so if anyone know whay please tell me. an as fast as posiabel awnser whould be preferabel.

using UnityEngine;

using System.Collections;

public class shoting : MonoBehaviour {

public float fierRate = 0.5f;

float cooldown = 0f;

public float damage = 25f;

// Update is called once per frame

void Update () {

cooldown -= Time.deltaTime;

if (Input.GetButton ("fire1")) {

fier();

}

}

void fier() {

if (cooldown > 0) {

return;

}

Ray ray = new Ray (Camera.main.transform.position, Camera.main.transform.forward);

Transform hitTransform;

hitTransform = FindClosestHitObject(ray);

if (hitTransform != null) {

helth h = hitTransform.GetComponent<helth>();

while(h == null && hitTransform.parent){

hitTransform = hitTransform.parent;

h = hitTransform.GetComponent<helth>();

}

if(h != null){

h.takedamage( damage );

}

}

cooldown = fierRate;

}

Transform FindClosestHitObject(Ray ray) {

RaycastHit[] hits = Physics.RaycastAll(ray);

Transform closestHit = null;

float distance = 0;

foreach (RaycastHit hit in hits) {

if(hit.transform != this.transform && ( closestHit==null || hit.distance < distance ) ){

closestHit = hit.transform;

distance = hit.distance;

}

}

}

}