as i thought, your linking the image source to your pc, look
background-image: url(../../My%20Pictures/gimp/gradient10.jpg);
it should be hosted in your hosting account for example
http://www.optionswebhosting.com/foldername/gimp/gradient10.jpg
hope that helps
More information about formatting options
Re: MSNBC Style Effect
as i thought, your linking the image source to your pc, look
background-image: url(../../My%20Pictures/gimp/gradient10.jpg);
it should be hosted in your hosting account for example
http://www.optionswebhosting.com/foldername/gimp/gradient10.jpg
hope that helps