ERROR 256: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [2002] Connection refused

Fatal error: DB connection error in PGV_DB::createInstance(): SQLSTATE[HY000] [2002] Connection refused in /www/webspaces/ftp61460/www/reetz.eu/phpgedview/includes/classes/class_pgv_db.php on line 405