Admin access blank

Hi all,

Just migrate servers and have updated config files but am having trouble with admin access: http://www.refurbiphones.co.uk/admin/

My admin config:

<?php
// HTTP
define('HTTP_SERVER', 'http://www.refurbiphones.co.uk/admin/');
define('HTTP_CATALOG', 'http://www.refurbiphones.co.uk/');
define('HTTP_IMAGE', 'http://www.refurbiphones.co.uk/image/');

// HTTPS
define('HTTPS_SERVER', 'http://www.refurbiphones.co.uk/admin/');
define('HTTPS_CATALOG', 'http://www.refurbiphones.co.uk/');
define('HTTPS_IMAGE', 'http://www.refurbiphones.co.uk/image/');

// DIR
define('DIR_APPLICATION', __DIR__ . '/admin/');
define('DIR_SYSTEM', __DIR__ . '/system/');
define('DIR_DATABASE', __DIR__ . '/system/database/');
define('DIR_LANGUAGE', __DIR__ . '/admin/language/');
define('DIR_TEMPLATE', __DIR__ . '/admin/view/template/');
define('DIR_CONFIG', __DIR__ . '/system/config/');
define('DIR_IMAGE', __DIR__ . '/image/');
define('DIR_CACHE', __DIR__ . '/system/cache/');
define('DIR_DOWNLOAD', __DIR__ . '/download/');
define('DIR_LOGS', __DIR__ . '/system/logs/');
define('DIR_CATALOG', __DIR__ . '/catalog/');


Any help would be greatly appreciated!

Thank you!

Any help or ideas people? Am willing to pay!