Responsive CSS

I’m working on a site that requires this gallery be responsive. I’ve noticed that the demo on this page is responsive and that the widths of the elements are actually changed in the DOM in real time, while mine doesn’t appear to be doing that.

I’m using the beta, version 2.0.2

Anyone else seeing anything similar?

https://www.ads-software.com/extend/plugins/nextgen-scrollgallery/