Problems after adding Charisterics

-- url of the page with the problem -- : www.mtc-tet.nl/index.php/webshop/checkout/product/updatecart
-- HikaShop version -- : 2.3.0
-- Joomla version -- : 2.5.18
-- PHP version -- : 5.3.3
-- Browser(s) name and version -- : XXXXX x.x.x
-- Error-message(debug-mod must be tuned on) -- : Error_message

I have just 2 products one with and one without Charisterics.
With the product without Charisterics everthing works fine, but when I click in the front-end on "Add to Chart" with the product with Charisterics I got the error message below.

PHP Fatal error: Call to a member function setQuery() on a non-object in E:\mtc-tet.nl\wwwroot\administrator\components\com_hikashop\classes\cart.php on line 926