Add UIButton on UIImagePicker

[baramedia]

Hi !
I develop an augmented reality application and I want to add a uibutton on uiimagepicker as a subview. The problem is that the button does not respond on my taps. Does anyone know how I can make the button to respond?
This is my code:

-(IBAction)Camera{
    UIImagePickerController *imgPicker = [[UIImagePickerController alloc]init];
    imgPicker.allowsEditing = NO;
    imgPicker.delegate = self;
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
        imgPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        [NSThread detachNewThreadSelector:@selector(AnimationThread) toTarget:self withObject:nil];
        imgPicker.showsCameraControls = NO;
        imgPicker.navigationBarHidden = NO;
        imgPicker.wantsFullScreenLayout = YES;
        CGAffineTransform translate = CGAffineTransformMakeTranslation(0.0, 27.0);
        imgPicker.cameraViewTransform = translate;
        CGAffineTransform scale = CGAffineTransformScale(translate, 1.125, 1.125);
        imgPicker.cameraViewTransform = scale; 
      UIButton *ShotButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [ShotButton addTarget:self action:@selector(Shot) forControlEvents:UIControlEventTouchUpInside];
        ShotButton.frame = CGRectMake(284.0, 442.0, 72.0,37.0);
        ShotButton.center = CGPointMake(284.0, 442.0);   
        imgPicker.cameraOverlayView.userInteractionEnabled = YES;
        [imgPicker.cameraOverlayView addSubview:ShotButton];
        [imgPicker.cameraOverlayView bringSubviewToFront:ShotButton];
        [self presentModalViewController:imgPicker animated:YES];
    }
    [imgPicker release];
-(void)Shot{
    
NSURL* musicFile = [NSURL fileURLWithPath:[[NSBundle mainBundle] 
                                               pathForResource:@"Shot"
                                               ofType:@"wav"]];
   click = [[AVAudioPlayer alloc] initWithContentsOfURL:musicFile error:nil];
    [click play];
}

Thank you very much....