Keep your resolution above 1024x600x16 and it should work!
i have already 1024x600x16 resolution but screenshot is not working (https://forum.vc-mp.org/proxy.php?request=http%3A%2F%2Fi.imgur.com%2F2Lzd9Ad.jpg&hash=b4b8458df11a3c1d1d1d5930e31113aa11fc9551) Any Solution??