A* Pathfinding- A moving target

So, Im using the A* pathfinding project, all is going well, and I've created a working AI. Great, however, it only goes to the targets original position, so if the target moves once the game starts, the AI wont notice. I tried adding all the stuff (minus GetComponent(CharacterController)) to the update function, but it doesnt work. Any advice on how I can work this script with moving targets? Thanks

 #pragma strict
 import Pathfinding;
 
 var turnSpeed : float = 10.0;
 var Target : Vector3;
 var seeker : Seeker;
 var CharCont : CharacterController;
 var path : Path;
 var speed : float = 100;
 var NextWaypointDistance : float = 0.8;
 private var currentWayPoint : int = 0; 
 
 
 function Start () {
 CharCont = GetComponent(CharacterController);
 Target = GameObject.FindWithTag("Target").transform.position;
 GetNewPath();
 
 }
 
 function Update () {
 }
 
 function GetNewPath(){
 seeker.StartPath(transform.position, Target, OnPathComplete);
 }
 
 function OnPathComplete(newPath : Path){
 if (!newPath.error){
 path = newPath;
 currentWayPoint = 0;
 }
 }
 
 function FixedUpdate(){
 
 if (path == null){
 return;
 }
 if (currentWayPoint >= path.vectorPath.Count){    //This is when its reached the end of its path
 return;
 }
 
 var dir : Vector3 = (path.vectorPath[currentWayPoint]-transform.position).normalized;
 dir *= speed * Time.fixedDeltaTime;
 
 CharCont.SimpleMove(dir);
 
 if (Vector3.Distance(transform.position, path.vectorPath[currentWayPoint]) < NextWaypointDistance){
 currentWayPoint++;
 }
 
 
 }