I'm having similar issues here... All I updated was the admin/includes/configure.php file (see below) and zen-cart is prompting me with the "Hello. Thank you for loading Zen-Cart" page. I can still access the dev. site; however, I can't get to the admin site.... any help is much appreciated! THANKS!

define('HTTP_SERVER', 'http://localhost');
define('HTTPS_SERVER', 'https://localhost');
define('HTTP_CATALOG_SERVER', 'http://localhost');
define('HTTPS_CATALOG_SERVER', 'https://localhost');

// secure webserver for catalog module and/or admin areas?
define('ENABLE_SSL_CATALOG', 'false');
define('ENABLE_SSL_ADMIN', 'false');

// NOTE: be sure to leave the trailing '/' at the end of these lines if you make changes!

// * DIR_WS_* = Webserver directories (virtual/URL)
// these paths are relative to top of your webspace ... (ie: under the public_html or httpdocs folder)
define('DIR_WS_ADMIN', '/bruno/');
define('DIR_WS_CATALOG', '/');
define('DIR_WS_HTTPS_ADMIN', '/bruno/');
define('DIR_WS_HTTPS_CATALOG', '/');

define('DIR_WS_IMAGES', 'images/');
define('DIR_WS_ICONS', DIR_WS_IMAGES . 'icons/');
define('DIR_WS_CATALOG_IMAGES', HTTP_CATALOG_SERVER . DIR_WS_CATALOG . 'images/');
define('DIR_WS_CATALOG_TEMPLATE', HTTP_CATALOG_SERVER . DIR_WS_CATALOG . 'includes/templates/');
define('DIR_WS_INCLUDES', 'includes/');
define('DIR_WS_BOXES', DIR_WS_INCLUDES . 'boxes/');
define('DIR_WS_FUNCTIONS', DIR_WS_INCLUDES . 'functions/');
define('DIR_WS_CLASSES', DIR_WS_INCLUDES . 'classes/');
define('DIR_WS_MODULES', DIR_WS_INCLUDES . 'modules/');
define('DIR_WS_LANGUAGES', DIR_WS_INCLUDES . 'languages/');
define('DIR_WS_CATALOG_LANGUAGES', HTTP_CATALOG_SERVER . DIR_WS_CATALOG . 'includes/languages/');

// * DIR_FS_* = Filesystem directories (local/physical)
//the following path is a COMPLETE path to your Zen Cart files. eg: /var/www/vhost/accountname/public_html/store/
define('DIR_FS_ADMIN', '/bruno/');
define('DIR_FS_CATALOG', '/');