Hi Clyde! Is me another time.
Is it possible that this mod interferes with the order total module?
Today i have this message when i go to admin>>modules>>order total:

Fatal error: Call to a member function on a non-object in /var/www/vhost/bellezaisis.com/home/html/shop/includes/modules/order_total/ot_gv.php on line 29

I´m crazy before being more than 4 hours sking me which is the origin of this message