Does this look like your admin/includes.configure.php?

@line 29 heck you can't miss it.

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

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