Player Colision help

I am having a problem with the 1st program I have made(I am a noob) I have a player ( the prebuilt 1st person one and a turret that shoots at me. The problem is thbullets only do damage when I am moving not when I am standing still. var fireBallPrefab:Transform; var other; private var dead = false;

 function OnControllerColliderHit(hit: ControllerColliderHit)
 {
 
 
 if(hit.gameObject.tag == "fallout")
 {
 dead = true;
 
 helth.LIVES -=1;
 
 print (hit);
 }
 if(hit.gameObject.tag == "enermybullet")
 {
 dead = true;
 
 helth.LIVES -=1;
 
 
 }
 
 
 
 
 
 
 
 
 }
 function Update ()
 {
 
 if(Input.GetButtonDown("Fire1"))
 {
 var fireBall=Instantiate(fireBallPrefab, GameObject.Find ("spawnPoint").transform.position, Quaternion.identity);
 fireBall.rigidbody.AddForce(transform.forward * 2000);
 
 
 }
 
 }
 
 function LateUpdate()
 
 
 
 {
 if(dead)
 
 {
 transform.position = Vector3 (3.385581,1.54974,0);
 dead = false;
 
 }
 }

This script is attached to the player

 #pragma strict
 var lifetime = 1.0;
 
 
 
 
 function Awake () {
 Destroy (gameObject, lifetime);
 }

This one is attached to the projectile

The bit that control death are contain in the if statement with the tag enermybullet I think I have to use "function OnTriggerEnter (other : Collider) {" but being a noob don't know how to fares it so some help would be good. (ps could you repost the working script & instructions AND ex plane why it isn't working.

Thanks

JAmes