数组 – Delphi：TImage数组

unit Unit1;

interface

uses
  Windows,Messages,SysUtils,Variants,Classes,Graphics,Controls,Forms,Dialogs,ExtCtrls;

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  Images: array[0..29,0..39] of TImage; //array
implementation

{$R *.dfm}
//form create
procedure TForm1.FormCreate(Sender: TObject);
var xx,yy: Integer; //local variables
begin
        for xx:=0 to 29 do
                for yy:=0 to 39 do
                        begin
                             Images[xx,yy]:=Timage.Create(Form1);
                             Images[xx,yy].Canvas.Rectangle(0,17,17);
                             Images[xx,yy].Left:=xx*16;
                             Images[xx,yy].Top:=yy*16;
                        end;
end;

end.

我总是得到错误：“Project Project1.exe引发了异常类EClassNotFound并显示消息”未找到TImage“.进程已停止.使用步骤或运行继续”

我在互联网上尝试过其他代码,例如：
Delphi: TImage.Create causes Access violation http://www.delphi-central.com/tutorials/memory_game_2.aspx

什么都没有帮助！为什么会这样？

谢谢.