My website (http://sosfb.saveourstraysfortbend.org/) is based on the art42-businessblue2 skin. I have a background image (/images/SOS Website Background w Prints.png) that I would like to be a full page background image. I have tried:

html {

/* added this */
  background: url('images/SOS Website Background w Prints.png') no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;

/* this was already here*/
  -ms-text-size-adjust: 100%;
   /* 2 */
  -webkit-text-size-adjust: 100%;
  /* 2 */}

but it is not displaying the image. Do you have any suggestions on how I can get this image to display?

Thanks.

Don Sharp