In the Checkout.php i have install this: http://addons.oscommerce.com/info/5750
But when i Install the Contri - > Fatal error: Call to a member function pre_confirmation_check () on a non-object in / includes / classes / onepage_checkout.php on line 741
I need the Checkout.php with this http://addons.oscommerce.com/info/5750 in creat account, have this and work. But for Checkout i need this too. ( German Shop )
Sorry for my English. Not good ;-)