Changing Background Header

Hi Sakin,  I've tried to adjust the header background to an image. After resizing to slider size, I've made the change in background.  It does work, but the image comes in below the header - that is between the slider and the page/post. What I would like is to have the image behind the slider at the top i.e. replacing the blue background or failing that as the footer image, replacing the blue background at the bottom. How do I get the image to show on these positions on the page? Site is www.iwritegreatcopy.com. Thanks for your assistance. Karin