cart not auto-refreshing properly

-- HikaShop version -- : 2.6.0
-- Joomla version -- : 3.4.7
-- PHP version -- : 5.4.43
-- Browser(s) name and version -- : all of them
-- Error-message(debug-mod must be tuned on) -- : the cart module is not working properly

Hello,
we updated to the latest version of hikashop (the latest version of the 2.6.0 package downloaded and installed today), we installed before the first package of the 2.6.0 and our "cart module" is not working properly anymore.

we read on this forum that the issue have to be fixed with the latest version of the package, but it didn't work and the module is still not auto-refreshing its contents when i add a product to the cart.

How can we fix this issue?

Waiting for your reply, all the best guys!!!

Thanks Nicolas that solution worked perfectly!