Zenphoto not loading picture in WordPress

have integrated Zenphoto into wordpress by adding the
<?php require($_SERVER['DOCUMENT_ROOT'].'/wp-blog-header.php'); ?> and sidebar, etc but i have a problem of it not loading a picture in my sidebar, you can see at http://www.2photo.co.uk if you click on the motorsport you see the grey box disapear from the page as that is zenphoto loading it.

this is what i have in my style.css in wordpress

.box-right {
	margin: 0px;
	padding: 20px 20px 25px 20px;
	background: url(img/bg-box-right.gif) repeat-x left bottom;

How can i make it work?