При вызове MediaPlayer1.Play выдает : EMCIDeviceError 'NO MCI Device open'

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Panel1: TPanel;
    MediaPlayer1: TMediaPlayer;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
   MediaPlayer1.Play;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
   MediaPlayer1.Display     := Panel1;
   MediaPlayer1.FileName    := 'zp';
   MediaPlayer1.AutoOpen    := True;
   MediaPlayer1.DisplayRect := Rect(0, 0, 400, 320);
   MediaPlayer1.Visible     := False;
end;

end.

что это может быть ?

Обязательно AutoOpen? Вот так работает:

procedure TForm1.FormCreate(Sender: TObject);
begin
   MediaPlayer1.Display     := Panel1;
   MediaPlayer1.FileName    := 'zp';
   MediaPlayer1.Open;
   MediaPlayer1.DisplayRect := Rect(0, 0, 400, 320);
   MediaPlayer1.Visible     := False;
end;

Попробуй так:

Спасибо, товарищи, все получилось