Not working on iPhone?

Hi,

I’ve installed this and using it on my responsive website. It works fine on desktop and the iPad. However on my iPhone, it doesn’t seem to work. The photos just open up by themselves in the window rather than in a lightbox.

Here’s an example URL. Any ideas?

http://www.mjworld.net/news/2013/10/17/billboards-top-halloween-songs/

Thanks!
Matt

http://wordpress.org/plugins/responsive-lightbox/