Uncle, give this a try for your background. The first one is from your code.
background:url(backround.png);
In this example, there's a color specified (in case the image fails), then notice the apostrophes around the image name and the ../ to specify where the image is coming from:
background: #0E0E0C url("../graphics/ss-header.png"); left top;
The 'left top' repeats this particular pattern across and down no matter the size of the browser screen.
See if that gets it working for you

(of course with your own file names)