Graphic checkout progress line disappear

Hi

I've got a small issue, regarding the graphic checkout progress bar. When I started eshop it was all right, but after upgrade to v 2.2.0 and yesterday i did upgrade to Bussiness edition i found, that now during the checkout i see only hyperlink text for each screen, not the graphic ""progress line" like before (as you can see at attached screenshot)

Thank you for your help

Best regards
Dominik

-- url of the page with the problem -- : www.biobox.sk
-- HikaShop version -- : Business 2.2.0
-- Joomla version -- : 2.5.14
-- PHP version -- : x.x.x
-- Browser(s) name and version -- : XXXXX x.x.x
-- Error-message(debug-mod must be tuned on) -- : Error_message

Hi,

It seems that there is an error in your frontend CSS file code that you customized via the Display tab of the configuration.
It doesn't seem to be related to the update.
Try to use the default frontend CSS file and you will see that it works.