when i test your site, it directs me to the pp_confirm.php page with the following error:
Warning: require_once(WA_Universal_Email/MailFormatting_PHP.php) [function.require-once]: failed to open stream: No such file or directory in /home/linweb02/a/altonmodelcentre.co.uk/user/htdocs/shop/pp_confirm.php on line 19
Fatal error: require_once() [function.require]: Failed opening required 'WA_Universal_Email/MailFormatting_PHP.php' (include_path='.:/usr/share/pear:/usr/share/php') in /home/linweb02/a/altonmodelcentre.co.uk/user/htdocs/shop/pp_confirm.php on line 19
meaning that the WA_Universal_Email/MailFormatting_PHP.php file has not been uplaoded to the server.