Photos in detail page do not give the option for go forward or backwards.

Hi,
I have websites and in one of them I used this code below and I liked the results to display the who images on the listings:

.geodir_category_list_view li .geodir-post-img .geodir_thumbnail {
background-size: contain!important;
}

and

.geodir_category_list_view li .geodir-post-img .geodir_thumbnail {
background-size: contain!important;
}

Then today I set this same CSS code to my other website and I realized that when I click on the photos in the detail page I do not have the option to click to view the next photo or the previous photo. Each photo gets displayed in it’s own windows and I have to close that window and open a new photo each time I want to see a new photo.

I removed the CSS above and cleared cache and still the same problem, I don’t have the option to click next and previous to see the photos. The only other thing I have changed recently is updating all my geodirectory plugins.

Could you take a look at my site and give me suggestions on why the next and previous do not work any more on the detail page when viewing photos?

Thank you.