Bot runs but not move

Hi guys, this script is attached to a bot that must run towards my player. The bot runs but do not move!

 #pragma strict

var awerness = 15.0; var scaryness = 10.0; var runSpeed = 4.0;

private var playerobj : GameObject; private var player: Transform; var controller : CharacterController; private var moveDirection = Vector3.zero;

enum lAIStatus {Idle = 0, Scared = 1} private var status = lAIStatus.Idle;

function Awake (){

playerobj = GameObject.FindWithTag("Player"); player = playerobj.transform; controller = GetComponent(CharacterController);

}

function Start () {

}

function Update () {

CheckStatus();

switch(status){

case lAIStatus.Idle : Idle(); break;

case lAIStatus.Scared: Runaway(); break; }

}

function Idle(){

animation.CrossFade ("idle");

}

function Runaway(){

transform.LookAt(player);

moveDirection = Vector3.MoveTowards(transform.position, player.position, runSpeed*Time.deltaTime);

moveDirection = transform.TransformDirection(moveDirection);

moveDirection *= runSpeed;

controller.SimpleMove(moveDirection * Time.deltaTime);

animation.CrossFade ("run");

}

function CheckStatus(){

var dist = (player.position - transform.position).magnitude;

if (dist < scaryness){

status = lAIStatus.Scared; }else{

status = lAIStatus.Idle; }

}