Popoper and NSImageView

Question

I'm having issues displaying a popover in my application. In this case, I cannot get the image to show.

This is my popover controller:

public partial class ImagePopoverController : NSViewController
{
    NSImageView _imageView = new NSImageView();
    // Called when created from unmanaged code
    public ImagePopoverController (IntPtr handle) : base (handle)
    {
        Initialize ();
    }

    // Called when created directly from a XIB file
    [Export ("initWithCoder:")]
    public ImagePopoverController (NSCoder coder) : base (coder)
    {
        Initialize ();
    }

    // Call to load from the XIB/NIB file
    public ImagePopoverController (NSImageView imageView) : base ("ImagePopover", NSBundle.MainBundle)
    {
        this._imageView = imageView;
        Initialize ();          
    }

    // Shared initialization code
    void Initialize ()
    {

    }

    public override void AwakeFromNib()
    {
        base.AwakeFromNib();
        View.AddSubview(_imageView);
    }

    //strongly typed view accessor
    public new ImagePopover View {
        get {
            return (ImagePopover) base.View;
        }
    }
}

When I call the popover it's diplayed where it should be, but it does not show any image in it.

NSImageView imageView = new NSImageView();
imageView.Image = new NSImage(String.Format("cache/{0}.png", User.PID));
ImagePopoverController Controller = new ImagePopoverController(imageView);
                 
imagePopover.ContentViewController = Controller;
ImagePopover.Show(new RectangleF(0, 0, 0, 0), View.View, NSRectEdge.MinYEdge);