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Plays many different videos on iphone using AVPlayer

I am working on a custom video player for iOS using AVFoundation. The idea is to be able to switch to another video with a gesture (tap, swipe on the screen, whatever). Now the player works flawlessly on the simulator , but when I test it on the device itself, the view disappears after 3 or 4 clicks. I even created playback controls for my player, when the view is empty, these controls load correctly but do nothing. Any ideas guys? This is initialization for the player.

            - (id)initWithContentURL:(NSString *)aContentURL delegate:(id)aDelegate {
        self = [super initWithNibName:@"NoCashMoviePlayer" bundle:nil];
        if (self == nil)
            return nil;
        delegate = aDelegate;
        systemPath = [aContentURL retain];
        contentURL = [[NSURL alloc]initFileURLWithPath:systemPath];
        asset = [AVURLAsset URLAssetWithURL:contentURL options:nil];
        playerItem = [AVPlayerItem playerItemWithAsset:asset];
        isPaused = false;
        controlsHidden = false;
        self.player = [[AVPlayer playerWithPlayerItem:playerItem] retain];
         duration = self.player.currentItem.asset.duration;

        return self;
    }

This is the code that plays the video:

    -(void)playMovie{

        UITapGestureRecognizer *tapRecon = [[UITapGestureRecognizer alloc]initWithTarget:self   action:@selector(toggleControls:)];
        [tapRecon setNumberOfTapsRequired:2]; 
        [self.movieContainer addGestureRecognizer:tapRecon];
        [tapRecon release];

        NSLog(@"Playing item: %@",contentURL);
        playerLayer = [AVPlayerLayer playerLayerWithPlayer:player];
        [movieContainer.layer addSublayer:playerLayer];
        playerLayer.frame = movieContainer.layer.bounds;
        playerLayer.videoGravity = AVLayerVideoGravityResizeAspect;
        self.seeker.alpha = 1.0;
        [self.view addSubview:movieContainer];
        [self.movieContainer addSubview:controls];
        [self setSlider];
        [player play];
        player.actionAtItemEnd = AVPlayerActionAtItemEndNone; 

        [[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(playerItemDidReachEnd:)
                                             name:AVPlayerItemDidPlayToEndTimeNotification
                                           object:[player currentItem]];


    }

Code for selecting a clip to play:

    -(void)viewSelect: (double) curTime{ 
        self.myView.backgroundColor = [UIColor blackColor];
        UISwipeGestureRecognizer *swipeRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFrom:)]; 
        swipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight; 
         [self.myView addGestureRecognizer:swipeRecognizer]; 
        [swipeRecognizer release];

        UISwipeGestureRecognizer *leftRecognizer = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeFromLeft:)]; 
        swipeRecognizer.direction = UISwipeGestureRecognizerDirectionLeft; 
        [self.myView addGestureRecognizer:leftRecognizer]; 
        [leftRecognizer release];


        if(isMain){
            [UIView animateWithDuration:0.5 delay:0.0 options:UIViewAnimationTransitionFlipFromLeft animations:^{
                self.myView.alpha = 1.0;
                moviePlayer = [[NoCashMoviePlayer alloc]initWithContentURL:[self movieURL:vidIndex] delegate:self];
                self.moviePlayer.view.frame = self.myView.bounds;
                self.moviePlayer.view.autoresizingMask = UIViewAutoresizingFlexibleWidth |UIViewAutoresizingFlexibleHeight;
                 [self.myView addSubview:moviePlayer.view];

            }completion:^(BOOL finished) {
                [self.moviePlayer.player seekToTime:CMTimeMake(curTime, 1)];
                [self.moviePlayer playMovie];
            }];
        }else{

            [UIView animateWithDuration:0.5 delay:0.0 options:UIViewAnimationTransitionFlipFromLeft animations:^{
                self.otherView.alpha = 1.0;
                moviePlayer = [[NoCashMoviePlayer alloc]initWithContentURL:[self movieURL:vidIndex] delegate:self];
                self.moviePlayer.view.frame = self.otherView.bounds;
                self.moviePlayer.view.autoresizingMask = UIViewAutoresizingFlexibleWidth |UIViewAutoresizingFlexibleHeight;
                [self.otherView addSubview:moviePlayer.view];

            }completion:^(BOOL finished) {

               [self.moviePlayer.player seekToTime:CMTimeMake(curTime, 1)];
                [self.moviePlayer playMovie];
            }];
        }
    }

And the last action of the gestures:

    - (void)handleSwipeFromLeft:(UISwipeGestureRecognizer *)recognizer { 

        double elapsedTime = 0.0;
        if(vidIndex==0){
            vidIndex = 3;
        }else vidIndex = vidIndex --;
        elapsedTime = [self.moviePlayer currentTimeInSeconds];
        [self.moviePlayer stopMovie];
        isMain = !isMain;
        [self viewSelect: elapsedTime];

    }

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    [player pause];
    contentURL = [[NSURL alloc] initFileURLWithPath:newPath];
    AVAsset *newAsset = [AVURLAsset URLAssetWithURL:contentURL options:nil];
    AVPlayerItem *newPlayerItem = [AVPlayerItem playerItemWithAsset:newAsset];
    [player replaceCurrentItemWithPlayerItem:newPlayerItem];
    [contentURL release];

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[systemPath autorelease];
systemPath = [aContentURL retain]

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