NextGEN Lightbox description HTML link not working

WordPress up to date? Yes
NextGEN up to date? Yes

(please confirm the following, with your server host tech) :
MySQL up to date (5.2.4)? Yes
PHP up to date (5.0)? Yes
The mod_rewrite Apache module activated? Yes
PHP Safe Mode OFF? Yes

I am using the next gen gallery plugin and lightbox functionality on he gallery. I am trying to make the captions on the enlarged lightbox image link to a specific post (every image has a different post). It says in the FAQ section that this is do-able with straight HTML however I cannot get it to work.

Here is my site: https://www.americasfinestmailbox.com/gallery/

It seems when I try to link the caption the lightbox times out or doesnt open.

Thank you so much for your help!

https://www.ads-software.com/extend/plugins/nextgen-gallery/