Checkout page redirection problem

-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.6.0
-- PHP version -- : 5.9.1
-- Error-message(debug-mod must be tuned on) -- : Checkout page redirection problem

HI nicolas
I have one problem in checkout redirection. I have placeed the order for redirect payments server return error message is not redirect to checkout page its redirect to home page and cart is empty. How to rectify that problem