Duplicating NavMesh Objects

Heya. I have a strange problem. I've made a NavMesh object, and I need to dublicate it. But when I'm doing it, these objects are not moving.

There's a code of Nav Meshed Object:

 #pragma strict
 private var nav : NavMeshAgent;
 private var target : Transform;
 var attackDistance : float = 5.0f;
 var seeDistance : float = 30.5f;
 var idleAnimation : AnimationClip;
 var walkAnimation : AnimationClip;
 function Start () {
 GetComponent.<Animation>().AddClip (idleAnimation, "idle");
 GetComponent.<Animation>().AddClip (walkAnimation, "walk");
 nav = GetComponent(NavMeshAgent);
 target = GameObject.FindWithTag("Player").transform;
 }
  
 function Update () {
 if(Vector3.Distance(transform.position, target.transform.position) < seeDistance){
 nav.enabled = true;
 nav.SetDestination(target.position);
 GetComponent.<Animation>().CrossFade("walk");
 } else {
 GetComponent.<Animation>().CrossFade("idle");
 nav.enabled = false;
 }
 }

Thanks for your help.