I am having the same problem with background images. Here is my code:
font-family: Palatino Linotype, serif;
margin: 0 auto;
I even tried adding the styling for html and with the cover values:
background: url(../images/books%20music%20bands%201617x1076%20wallpaper_wallpaperbeautiful_99.jpg) no-repeat center center fixed;
But nothing worked. I have tried my image multiple times, but it didn't work either. It is 1000px in width by 300px in height.