Can't checkout with mobile android phone.

-- url of the page with the problem -- : atpmechanix.com
-- HikaShop version -- : 2.2.1
-- Joomla version -- : 2.5
-- PHP version -- : NA
-- Browser(s) name and version -- : Mozilla Firefox
-- Error-message(debug-mod must be tuned on) -- : Error_message


I have a serious problem that you might be able to help me resolve. I'm able to checkout perfectly fine with my laptop computer; however, when I try checking out with my mobile android phone It just keeps looping for me to retype my credit card information. Any tips or suggestions?

I get the same error regardless of whether I'm using my desktop or my smartphone on your website:
Fatal error: Call to undefined method stdclass::resetCart() in /hom/atpmecha/public_html/plugins/hikashoppayment/firstdata/firstdata.php on line 165
There is however no such line of code in that payment plugin.
It seems that your payment plugins were not updated when you updated HikaShop. Delete the folder /hom/atpmecha/public_html/plugins/hikashoppayment/ via FTP and install the latest version again and try again, it should then not have that issue.