I installed zen cart to http://www.domain.com/shop and now I want to move it to http://shop.domain.com I have edited admin/includes/configures.php and includes/configures.php to read

define('HTTP_SERVER', 'http://shop.domain.com');
define('HTTPS_SERVER', 'https://shop.domain.com');

and admin/includes/configures.php

define('HTTP_SERVER', 'http://shop.domain.com');
define('HTTPS_SERVER', 'https://shop.domain.com');
define('HTTP_CATALOG_SERVER', 'http://shop.domain.com');
define('HTTPS_CATALOG_SERVER', 'https://shop.domain.com');

I can see the store but none of the images show up just text.