Gallery shortcode problem

Hello. I have never had an issue using the gallery shortcode, but with this current site, it is hosted with a local IT company, who has several restrictions on permissions. I am assuming that that is the issue with the images not enlarging, but I wanted to see if anyone has experienced anything similar. All I am using on the page is [gallery id="ID of post"]

https://wp.asignbydesign.com/index.php/commerical-sign-portfolio/pylons_signs/

Thanks,
Angie