thanks - i ran the debug and i came back with this error:

[06-Nov-2008 11:38:44] PHP Warning: require_once(includes/classes/module_installer.php) [<a href='function.require-once'>function.require-once</a>]:led to open stream: No such file or directory in /usr/local/www/vhosts/grtcustom5.com/httpdocs/store/admin/ssu.php on line 10
[06-Nov-2008 11:38:44] PHP Fatal error: require_once() [<a href='function.require'>function.require</a>]: Failed opening required 'includes/classes/module_installer.php' (include_path='.:/usr/local/psa/psa-horde/pear/') in /usr/local/www/vhosts/grtcustom5.com/httpdocs/store/admin/ssu.php on line 10


I'm sorry - I'm not really sure what it all means....