Why do i get this error

this is the error Assets/MelleSystem.js(10,86): BCE0023: No appropriate version of 'UnityEngine.Transform.TransformDirection' for the argument list '(UnityEngine.Vector3, UnityEngine.RaycastHit)' was found.

 #pragma strict
 var TheDamage : int = 50;
 var Distance : float;
 
 function Update ()
 {
     if (Input.GetButtonDown("Fire1"))
     {
         var hit : RaycastHit;
         if (Physics.Raycast (transform.position, transform.TransformDirection(Vector3.forward, hit)));
         {
             Distance = hit.distance;
             hit.transform.SendMessage("ApplyDamage", TheDamage, SendMessageOptions.DontRequireReceiver);
         }
     }
 }