What's wrong with my function? It keeps telling me 'loseText' is not a member of 'UnityEngine.GUIText'. Please help, please and thank you!

function HitEnemy(enemy : Collider): IEnumerator {

 if(powerMode == false)
 {
     
     
     lives --;
     
     livesText.text = "Lives: " + lives;
     
     
     if(lives <= 0)
     {
     
         
         **GUIText.loseText.enabled = true;** 
                 
         Destroy(gameObject);
     }
     else
     {
         collider.enabled = false;
         
         
         
         renderer.enabled = false;
         yield WaitForSeconds(2);        
         
         
         collider.enabled = true;
         
         
         renderer.enabled = true;
         
         
     }
 }
 else
 {
     
     AddScore(enemyValue, false);
     enemy.SendMessage("Eat");
 }

}