Using Wootheme Swatch, how to change lightbok to show a full size image?

I hope it is the right place to post it:
On this page:
http://wilddiamonds.co.il/?portfolio=%D7%94%D7%9C%D7%94
you can see that when you click the image lightbox does not display the full sized image. I saw the lightbok is not refered to the full sized image but I don’t know how to change it.
Can anyone help me out?
Thank you,
Itay