Images not loading on a certain website

I think there's an easy solution to this problem but so far it's eluded me.

On one particular website forum when I load pages the images don't show up. There were no problems previously but then a week or so ago it started. No one else on the forums seems to have that problem and the owner of the site had no idea. It doesn't happen on any other forums I'm on.

I went into Norton Internet Security/Privacy Control/Advanced and added the website to the list in Web Contents Options and permitted everything. However, I still don't get images on that website. So I turned off Security and then all the images loaded as they normally used to.

There must be a setting there somewhere that can be changed to allow the images to load. But it's got me beat. Hoping that someone out there might be able to guide me in the right direction. Thanks.