(20,57): BCE0022: Cannot convert 'EnemyAI[]' to 'EnemyAI'.

 var alert : boolean;
  var caution : boolean;
  var normal : boolean;
  var alertTimer : float;
  var cautionTimer : float;
  var alertTime : float = 30;
  var cautionTime : float = 30;
  //CHASING
  var statusGUI : UI.Text;
  var guardSpawn : Transform;
  //var enemy : GameObject;
  var enemyUnit : GameObject[];
  var enemyAIScript : EnemyAI [];
  var enemyHuntScript : EnemyHunt[];
  
  function Start(){
  enemyUnit = GameObject.FindGameObjectsWithTag("Enemy");
  for(var i : int = 0; i < enemyUnit.Length; i++)
     {
  enemyAIScript[i] = enemyUnit[i].GetComponents.<EnemyAI>();
  enemyHuntScript[i] = enemyUnit[i].GetComponents.<EnemyHunt>();
     }
 //
 // alert = false;
 // caution = false;
 // normal = true;
 
  }
  function Update(){
  
  
  if(alert == true){
         if(alertTimer >= 0){
          print("alert");
          statusGUI.text = "ALERT : "+alertTimer;
          alertTimer -= Time.deltaTime;
          enemyHuntScript.enabled = true;
          enemyAIScript.enabled = false;
      }else{
          //ALERT FINISHED
          //SWITCH TO CAUTION
          ActivateCaution();
          print("CAUTION");
          statusGUI.text = "";
      }
  }
  //CAUTION
  if(caution == true){ 
      if(cautionTimer >= 0){
          print("CAUTION");
          statusGUI.text = "CAUTION : "+cautionTimer;
          cautionTimer -= Time.deltaTime;
      }else{
          //
          alert = false;
          caution = false;
          normal = true;
          statusGUI.guiText.text = "";
      }
  }
  //NORMAL
  if(normal == true){
  
  alert = false;
  caution = false;
  print("Normal");
  alertTimer = 30;
  cautionTimer = 30;
  statusGUI.text = "NORMAL";
    for(var a : int = 0; a < enemyAIScript.Length; a++)
     {
        enemyAIScript[a].enabled = true;
 
     }
  for(var b : int = 0; b < enemyHuntScript.length; b++){
  enemyHuntScript[b].enabled = false;
  }
  }
  
  
  }
  
  
  function ActivateAlert(){
  alert = true;
  alertTimer = alertTime;
  caution = false;
  normal = false;
  }
  
  function ActivateCaution(){
  caution = true;
  cautionTimer = cautionTime;
  alert = false;
  normal = false;
  }

ERROR :Assets/FORCE/Enemies/RegularUnits/ControlAI.js(20,57): BCE0022: Cannot convert 'EnemyAI[]' to 'EnemyAI'.

EERROR :Assets/FORCE/Enemies/RegularUnits/ControlAI.js(20,57): BCE0022: Cannot convert 'EnemyAI[]' to 'EnemyAI'.

Not really sure whats wrong here but I'm getting errors anyway. If you want to see what my script is about read my last question because its the same script(GameController/Manager script)

Thanks Stealth