Image show gk4 static

Hi,
I've a quark template and, as you can see http://www.didjeridooing.com/NUOVO/, the Image show gk4 doesn't work - I have read the forum and the installation manual (https://www.gavick.com/joomla-templates ... -placement) but I haven't find the solution... do you have any idea? Can someone please help me?
Thank you

Hi

I think it's not working correctly because most of Your images are huge. I've made it to work while images are loaded partially. Try reduce the size, maybe optimize Your site a little better just to speed it up.

http://g.recordit.co/Y24ryHWrkU.gif