WP lightbox 2 Issue

I am using http://zeo.unic.net.my/ plugin that makes use of WP lightbox 2. It works perfectly but there is one problem. Take this page for example: http://www.sugar-buzz.net/stock-photos/flowers-and-plants/
It auotmatically added rel=”lightbox” to the image link which I don’t want in this case. What can I do about this?