If turning off the firewall didn't help it's probably not going to help to write a rule for it. The only other suggestion I can make is to try uninstalling and reinstalling Netscape, or try Firefox. Obviously, somewhere between this site and your computer there is some kind of conflict. And sometimes these things are almost impossible to figure out. I have a couple of my own I've been working at for months with no success. Nothing devastating, just annoying. I can sympathize with you.
Good luck with it.
One other thought. Are you familiar with "SpyBot" and "Hijack This"?Don't know if they can help but it wouldn't hurt to try.