Walk Animations?

This is the code for my point and click game, idle works but no run!: using UnityEngine; using System.Collections;

public class Clicktomove : MonoBehaviour { NavMeshAgent navAgent; Animation PlayerAnimation;

 // Use this for initialization
 void Start () 
 {
     navAgent = GetComponent<NavMeshAgent> ();
     PlayerAnimation = GetComponent<Animation> ();

 }
 
 // Update is called once per frame
 void Update () 
 {

     MovementAnimation ();
     RaycastHit hit;
     Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);

     if(Input.GetMouseButtonUp(0))
     {
         if(Physics.Raycast(ray, out hit, 1000)) 
         {
             navAgent.SetDestination(hit.point);
         }
     }
 }


 void MovementAnimation(){
     //print (navAgent.velocity);
     if (navAgent.velocity.x != 0 || navAgent.velocity.y != 0 || navAgent.velocity.z != 0) {
         if 
             (!PlayerAnimation.isPlaying){
             PlayerAnimation.CrossFade ("run");
             PlayerAnimation.Play("run");
         }
         print ("Moving!");

     } else {
         if (!PlayerAnimation.isPlaying){
             PlayerAnimation.CrossFade ("Idle");
             PlayerAnimation.Play("Idle");
         }
         print ("Not moving!");
     }
 }

}