Saludos,,,,
Intenta hacer este cambio en admin/plugins/visitas,php
localiza :
$root_path = (eregi("\/plugins\/", $PHP_SELF)) ? "./../../" : "./../";
define('ROOT_PATH', $root_path);
Cambia a :
//$root_path = (eregi("\/plugins\/", $PHP_SELF)) ? "./../../" : "./../";
define('ROOT_PATH', "../../");
excitex2