enemy mechanics script and declining health

so i cleared up both scripts with no bugs or errors but things don't seem to be working. im getting the error:

UnityException: Input Button fire1 is not setup. To change the input settings use: Edit -> Project Settings -> Input MelleSystem.Update () (at Assets/scripts/MelleSystem.js:9)

i know what this means and i thought i knew how to fix it but it didn't work

here is the script

 #pragma strict
 
 var Damage : int = 50;
 var Distance : float;
 var MaxDistance : float = 1.5;
 
 function Update ()
 {
     if (Input.GetButtonDown("fire1"))
     
         var Hit : RaycastHit;
         if (Physics.Raycast (transform.position, transform.TransformDirection(Vector3.forward), Hit))
         
             Distance=Hit.distance;
             if (Distance < MaxDistance)
             
                 (
                 Hit.transform.SendMessage("ApplyDamage", Damage, SendMessageOptions.DontRequireReceiver)
                 );
 }

as well as the simple enemy Logic script that goes with it.

 #pragma strict
 
 var Health = 100;
 
 function Update ()
 {
     if (Health <= 0)
         {
         Dead();
         }
 }
 
 function ApplyDamage (Damage : int)
 {
 Health -= Damage;
 }
 
 function Dead()
 {
     Destroy (gameObject);
 }

thank you.