XML Flash ActionScript

package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var user1:XML = 
            joe
            linuxRules
          
;
          
        var user2:XML = 
            ken
            default
          
;
        
        trace(user1);
        trace(user2);
        user2.PASSWORD = user1.PASSWORD;
        trace(user1);
        trace(user2);
        
        trace(user1.PASSWORD[0] == user2.PASSWORD[0]); // Displays: true
        
        trace(user1.PASSWORD[0]