Need help with navmesh,Already bake Navmesh but still got error

I already bake a NavMesh but still got Error that said
“Setdestination can only be use on active agent that’s on Navmesh”

here is that picture to makesure that I already bake a Navmesh
Imgur
alt text

Code*
public Transform target;
public NavMeshAgent agent;

// Use this for initialization
void Start () {
	agent = GetComponent<NavMeshAgent>();
}

// Update is called once per frame
void Update () {
	target = GameObject.Find ("Player").gameObject.transform;
	agent.SetDestination (target.position);
}

}

Ty in advance

I just test everything on the normal cube it’s work just fine but when I use it on Import 3d model it’s always show the error