My weapon does no damage?

I have been watching brackeys tutorial on how to make a survival game and it seems like i have messed up the weapon. It does no damage even tough the script is downloaded direcly from his web. I belive that it has to do something with the unity settings but i just cant figure it out.

 var TheDammage : int = 50;
 var Distance : float;
 var MaxDistance : float = 1.5;
 var TheSystem : Transform;
 
 function Update ()
 {
     if (Input.GetButtonDown("Fire1")) 
     {
         
         animation.Play("Attack");
 
     }
 
 }
 
 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);
             }
         }
 }

Everything works perfecly except this, and i think it has something to do with the var Distance : float;

The Distance value should change each time i attack but it does not. Here is an video of his video for a greater understanding of my problem https://www.youtube.com/watch?v=C6c9J9CSEvA Thank you in advance.