LazReport - drukuje się tylko pierwsza z grup

unit unit2;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, LR_Class, LR_DSet, Forms, Controls, Graphics,
  Dialogs, Grids, StdCtrls;

type

  { TForm1 }

  TForm1 = class(TForm)
    Button1: TButton;
    frReport1: TfrReport;
    frUserDataset1: TfrUserDataset;
    StringGrid1: TStringGrid;
    procedure Button1Click(Sender: TObject);
    procedure frReport1GetValue(const ParName: String; var ParValue: Variant);
    procedure frUserDataset1CheckEOF(Sender: TObject; var Eof: Boolean);
    procedure frUserDataset1First(Sender: TObject);
    procedure frUserDataset1Next(Sender: TObject);
  private
    { private declarations }
  public
    { public declarations }
  end;

var
  Form1: TForm1;
  lp: longint;

implementation

{$R *.lfm}

{ TForm1 }

procedure TForm1.frUserDataset1CheckEOF(Sender: TObject; var Eof: Boolean);
begin
  //EOF:=lp>Stringgrid1.RowCount-1;
  If frUserDataSet1.RecNo=StringGrid1.RowCount-1 then Eof:=true;
end;

procedure TForm1.frReport1GetValue(const ParName: String; var ParValue: Variant
  );
begin
  If ParName='Produkt' then ParValue:=Stringgrid1.Cells[0,lp];
  If ParName='Grupa' then ParValue:=Stringgrid1.Cells[1,lp];
  If parName='Cena' then ParValue:=Stringgrid1.Cells[2,lp];
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  frReport1.LoadFromFile(AppendPathDelim(ExtractFilePath(Application.ExeName))+'test2lrf.lrf');
  frReport1.ShowReport;
end;

procedure TForm1.frUserDataset1First(Sender: TObject);
begin
  lp:=1;
end;

procedure TForm1.frUserDataset1Next(Sender: TObject);
begin
  Inc(lp);
end;

end.