header image not displayed in child-theme

Hi
I copied my 2013-childtheme to a new wordpress installation (for a subdomain) but now it doesn’t display the header image.

style-css:

.site-header .home-link {
	background-color: #fffcfd;
	background: url(/wp-content/uploads/header-image.jpg) no-repeat;}

Look here for the working original
That’s the new copy (not working, he?)
Anything else I need to do to make the header image displayed?