FancyBox on iPhone

Hi there,

FancyBox working great on my site on desktop browsers and android, but on iPhone is opening up only a small version of the image (same size as the thumbnail) when viewing the mobile version of the site served up with WPTouch Pro.

Any suggestions as to how to fix this?

Many thanks

http://ww.wp.xz.cn/extend/plugins/fancybox-for-wordpress/