I ahve now turned on for big popup window to work and set to yes.
Same for lightbox. I ahve image size set as width 800 and height at 600.
I am still not getting it to work as on the site above.
I be glad to send you admin rights if you want to look at my settings.
Duh I got it and like above was thinking backwards. Upped my width and height and now its working.