UriImageSource-based image not rendering

Hello,

I am creating an image from a Uri, but it doesn't render in my app at all (note that local images work fine!). I believe everything is set up correctly, so I'm a little confused as to the cause of the problem!

private static Image GenerateImage(string imagePath)
        {
            Image image = new Image()
            {
                Source = ImageSource.FromUri(new Uri(imagePath))
            };
            return image;
        }

Any ideas as to what is causing the problem? That code doesn't appear to reveal that much, as it sets the source correctly.

Thanks,
Richard