I have been watching his tutorial but nothing happens

I downloaded the assets folder that him putted on his video, but when i add the script to the empty object, the enemy don´t lose health.THERE IS FIRTS THE MELEE SYSTEM SCRIPT AND SECOND THE ENEMY HEALTH SCRIPT, PLEASE TELLME WAHT I DID WRONG, HERE IS THE TUTORIAL LINK: http://www.youtube.com/watch?v=HzTceINFowY&lc=pxBg1RDOkZT48VdBVNLOTZ7EnYB6MeCUuMH_-hybGCU

 //IMPORTANT NOTE: This script was updated last in tutorial number 6. If you haven't watched it yet, go do it before messaging me with errors :)
 
 #pragma strict
 
 var TheDammage : int = 50;
 var Distance : float;
 var MaxDistance : float = 1.5;
 var TheSystem : Transform;
 
 function Update ()
 {
     if (Input.GetButtonDown("Fire1")) 
     {
         //Attack animation - IF YOU ARE GETTING ERRORS BECAUSE YOU HAVENT MADE AN ANIMATION AND ATTACHED IT, DELETE THE FOLOWING LINE.
         animation.Play("Attack");
 
     }
 //    if (TheMace.animation.isPlaying == false)
 //    {
 //        TheMace.animation.CrossFade("Idle");
 //    }
 //    
 //    if (Input.GetKey (KeyCode.LeftShift))
 //    {
 //        TheMace.animation.CrossFade("Sprint");
 //    }
 //    
 //    if (Input.GetKeyUp(KeyCode.LeftShift))
 //    {
 //        TheMace.animation.CrossFade("Idle");
 //    }
 }
 
 function AttackDammage ()
 {
         //Attack function
         var hit : RaycastHit;
         if (Physics.Raycast (TheSystem.transform.position, TheSystem.transform.TransformDirection(Vector3.forward), hit))
         {
             Distance = hit.distance;
             if (Distance < MaxDistance)
             {
                 hit.transform.SendMessage("ApplyDammage", TheDammage, SendMessageOptions.DontRequireReceiver);
             }
         }
 }