fancybox in template

hello,
after upgrade to version virtuemart 2.0.22a is not show popup window about add to cart.
Can you advise me how to turn fancybox?
Thanks

site running yet to 2.0.20b
www.drogeriededra.cz/shop-2/dekorace-a-d...x-260-mm-1-ks-detail

It works when I test it?

In vm update page on top you usualy have some instructions that need to be applied becuse of update compatibility, if there is issue you should check for that.

I've had new version 2.0.22a on test subdomain, there was a conflict with a ajax cart,
so I changed the cart and everything works.
thanks have a nice day