A*Pathfinding repath?

Hi, I've being trying to get my script to repath an object such that it tracks a user controlled character.

This is the current script I'm working on.

Code (JavaScript):

1. import Pathfinding;
2.  
3. //var tankTurret : Transform;
4. var tankBody : Transform;
5. //var tankCompass: Transform;
6. var turnSpeed : float = 10.0;
7.  
8. var targetPosition : Vector3;
9. var seeker : Seeker;
10. var controller : CharacterController;
11. var path : Path;
12. var speed : float = 100;
13. var nextWaypointDistance : float = 3.0;
14. var repathRate : float = 0.1;
15. private var currentWaypoint : int = 0;
16.  
17. function Start()
18. {
19.     targetPosition = GameObject.FindWithTag("GTO").transform.position;
20.     GetNewPath();
21. }
22.  
23. function GetNewPath()
24. {
25.     Debug.Log("GETTING NEW PATH!");
26.     seeker.StartPath(transform.position,targetPosition,OnPathComplete);
27.    
28.        
29.     /*if (seeker.IsDone())
30.     {
31.     seeker.StartPath(transform.position, targetPosition, OnPathComplete);
32.     }*/
33. }
34.  
35. function OnPathComplete(newPath : Path)
36. {
37.     if(!GetNewPath.error)
38.     {
39.         path = newPath;
40.         currentWaypoint = 0;
41.     }
42. }
43. function FixedUpdate()
44. {        
45.     if(path==null)
46.     {
47.         return;
48. //            Debug.Log("NO PATH!?");
49.     }
50.     /*if(currentWaypoint >= path.vectorPath.Length)
51.     {
52.         return;
53.     }*/
54.    
55.     var dir : Vector3 = (path.vectorPath[currentWaypoint]-transform.position).normalized;
56.    
57.     controller.SimpleMove(dir);
58.    
59.     //tankCompass.LookAt(path.vectorPath[currentWaypoint]);
60.     //tankBody.rotation = Quaternion.Lerp(tankBody.rotation, tankBody.rotation, Time.deltaTime*turnSpeed);
61.    
62.     if(Vector3.Distance (transform.position,path.vectorPath[currentWaypoint]) < nextWaypointDistance)
63.     {
64.         currentWaypoint++;
65.     }
66.    
67. }
68.  

Would appreciate any input on what I could add / modify to get it working.