all images will not display in an album

Shaw

I have 59 images in an album but only 42 show online. When I add a new image I see it in the back end but the image doesn't display online after applying. I can add the same image to other albums with no problem so it isn't the image itself and have tried adding other different images to this album with no luck. All other albums seem to work fine. Website is www.mercurygallery.com and the problem album is Joseph solman

acrylian

Your site is not accessible at all:

Forbidden
You don't have permission to access / on this server.
Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.

Probably you got a permissions issue on your installation. The error logs of your server should tell something as well as setup on installing should have