Melee system error help!

Why wont this work i cant hit my enemy at all and theres no errors coming up put it wont hit the enemy when i click my mouse

Script:

#pragma strict

var TheDammage : int = 50;
var Distance : float;
var MaxDistance : float = 1.5;
var TheSystem : Transform;

function Update ()
{
	if (Input.GetButtonDown("Fire1")) 
	{
		

	}

}

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);
			}
		}
}

As @hoekii said you aren’t calling the function at all, so you will have to add it like this:

function Update ()
{
     if (Input.GetButtonDown("Fire1")) 
     {
         AttackDammage();
     }
}

function Update ()
{

if (Input.GetButtonDown(“Fire1”))

{

AttackDamage();

 }

}