مولد التقارير fastrepot لا يتعرف على dataset

كود :
http://www.componentace.com/reports-fast-report-delphi.htm

unit Main;

interface
{$I CompVer.inc}

uses
{$IFDEF D6H}
  Variants,
{$ENDIF}
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls, DBCtrls, Grids, DBGrids, DB, ABSMain,
  frxClass, frxDBSet;

const  DataBaseFileName: String = '..\..\Data\Demos.abs';

type
  TForm1 = class(TForm)
    dbDemos: TABSDatabase;
    ABSTable1: TABSTable;
    DataSource1: TDataSource;
    DBGrid1: TDBGrid;
    DBNavigator1: TDBNavigator;
    Button1: TButton;
    frxDBDataset1: TfrxDBDataset;
    GroupBox1: TGroupBox;
    Label1: TLabel;
    frxReport1: TfrxReport;
    procedure FormCreate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
  dbDemos.DatabaseFileName := ExtractFilePath(Application.ExeName) + DataBaseFileName;
  ABSTable1.Open;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
 frxReport1.ShowReport;
end;

end.