Set nowplayingInfo to show song title, artist on air (apple tv), not work

I'm looking for everything about setting up a composition for broadcast, it looks just like that, but I still can't improve my application.
I am using MPMoviePlayerController to play audio. And I also read the AirPlay review at developer.apple.com.

I have set the following code in my opinion

- (BOOL) canBecomeFirstResponder {return YES;}
- (void) viewDidAppear: (BOOL) animated {
    [super viewDidAppear:animated];
    [ [UIApplication sharedApplication] beginReceivingRemoteControlEvents];
    [self becomeFirstResponder];
}
- (void) remoteControlReceivedWithEvent: (UIEvent *) receivedEvent {
    if (receivedEvent.type == UIEventTypeRemoteControl) {
        switch (receivedEvent.subtype) {
            case UIEventSubtypeRemoteControlTogglePlayPause:
               // [self playPauseToggle: nil]
                break;
            case UIEventSubtypeRemoteControlNextTrack:
                [self nextTrack: nil]
                break;
     }
}

      

        
        
        
      

    

and also install nowplayinginfo before playing music (tried installing this after playing music)

NSMutableDictionary *airPlaySongInfo = [[NSMutableDictionary alloc]init];
        [airPlaySongInfo setObject:@"hihi title"] forKey:MPMediaItemPropertyTitle];
        [airPlaySongInfo setObject:@"hihi artist"forKey:MPMediaItemPropertyArtist];
        [airPlaySongInfo setObject:@"hihi album" forKey:MPMediaItemPropertyAlbumTitle];
        [airPlaySongInfo setObject:albumArt forKey:MPMediaItemPropertyArtwork];
        [[MPNowPlayingInfoCenter defaultCenter] setNowPlayingInfo:airPlaySongInfo];

      

        
        
        
      

    

and I set background to play audio in plist.
but there is no title, artist or album on my tv. Did I miss something? or is there something conflicting?