background image in the body tag

Hi there, I did include an image in the body tag. With the media query I try to assign the right image (I do have 4 different sizes) to the used device. However, the result is not as expected. It works with the large screen, but smaller version do not bring the correct result. Here the syntax of the large screens: @media (min-width:1200px) body { background:url("Yoga1-lg.jpg")no-repeat center center fixed; background-size:cover; font-size:100%; } Smaller devices refer to a different image. Any idea what is wrong with the above??? Cheers Holger

Can you share a link to the site so we can get a better idea of answers to help you?