Zenphoto Error

MySQL Error: The PHP MySQL extentions have not been installed. Please ask your administrator to add MySQL support to your PHP installation.

Backtrace:

   in db_connect (functions-db.php [64])
     in query (functions-db.php [120])
       in query_full_array (functions.php [104])
         in getOption (functions.php [41])
           in require_once (functions-db.php [5])
             in require_once (auth_zp.php [3])
               in require_once (classes.php [6])
                 in require_once (template-functions.php [10])
                   in require_once (index.php [11])