Why am I seeing "Free" when I change my currency?

-- url of the page with the problem -- : www.222publications.com/newcatalog/en/holybiblenref/bible
-- HikaShop version -- : 2.3.5
-- Joomla version -- : 2.5.16
-- PHP version -- : 5.3.28
-- Browser(s) name and version -- : CHROME

Hello Everyone.

I was working with my website today when I found out that my category pages show me a "FREE" price for the books whenever I change the default currency which is POUNDS. Why is this happening? Whenever I go into the book page though, it shows me the correct converted price. Could someone please help me? This s Urgent.

Thanks

Thanks! It worked.