It appear "That's too low" when it should appear me "I am thinking of a number between 0 and 99"

This is mi Code pls HELP

It would be really apracate it the Help (sorry for the bad english)

package

{

  import flash.display.Loader;

  import flash.display.Sprite;

  import flash.events.KeyboardEvent;

  import flash.events.MouseEvent;

  import flash.net.URLRequest;

  import flash.text.*;

  import flash.ui.Keyboard;

  [SWF(width="550", height="400", backgroundColor="#FFFFFF", frameRate="60")]

  public class NumberGuessingGame extends Sprite

  {

  //In/Output vareables

  public var format:TextFormat = new TextFormat();

  public var output:TextField = new TextField();

  public var input:TextField = new TextField();

  //Game Vareables

  public var startMessage:String;

  public var mysteryNumber:uint;

  public var currentGuess:uint;

  public function NumberGuessingGame()

  {

  setupTextField();

  startGame();

  playGame();

  }

  public function setupTextField()

  {

  //Set the text format objects

  format.font = "Helventica";

  format.size = 32;

  format.color = 0xFF0000;

  format.align = TextFormatAlign.LEFT;

  //Configure the output text field

  output.defaultTextFormat = format ;

  output.width = 400;

  output.height = 80;

  output.border = true;

  output.wordWrap = true;

  output.text = "This is the output text field";

  //Display and position the output text field

  stage.addChild(output)

  output.x = 70;

  output.y = 65;

  //Configure the input text field

  format.size = 60;

  input.defaultTextFormat = format;

  input.width = 80;

  input.height = 60;

  input.border = true;

  input.background = true;

  input.backgroundColor = 0xCCCCCC;

  input.type = "input";

  input.text = "";

  input.maxChars = 2;

  input.restrict = "0-9";

  input.displayAsPassword = false;

  input.selectable = true;

  //Display the position of the Input text field

  stage.addChild(input);

  input.x = 70;

  input.y = 150;

  stage.focus = input;

  }

  public function playGame():void

  {

  currentGuess = uint(input.text);

  if(currentGuess > mysteryNumber)

  {

  output.text = "That's too high.";

  }

  else if (currentGuess < mysteryNumber)

  {

  output.text = "That's too low.";

  }

  else

  {

  output.text = "You got it!";

  }

  }

  public function keyPressHandler(Event:KeyboardEvent):void

  {

  if(Event.keyCode == Keyboard.ENTER){

  playGame();

  }

  }

  public function startGame():void

  {

  //Initialize variables

  startMessage = "I am thinking of a number between 0 and 99";

  mysteryNumber = 50;

  //Initialize text fields

  output.text = startMessage;

  input.text = "";

  //add an event listener for key presses

  stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressHandler);

  }

  }

}