Every site I go to loads and works normally except one: http://www.plhh.com. I know for a fact the it works fine. I am using a Linksys router, and I am almost sure that it has something to do with the router settings. I have pluged my cable modem straight to the pc (without the router), set to get IP address automatically, and the site loads. When I go back with the router, the site doesn't load again.
Since no one has responded to your post I will try to help.
Make sure you are not filtering web sites. I have mine set to block certian sites, and key words.
You might try blowing the router back to factory. Then do the setup again. There are some setting on firewalls that relates to the time to for a site to respond. I had to increase a couple of those settings on my smc.
Since it work direct it eliminates local firewall or browser settings.