by the way, I know for a fact that internet explorer has no error message that says "you can see this". I'm trying to help you the least you can do for free help is is not ignore me.
Well, the onyl thing that comes to mind with that error message is if your ip is posisbly banned. I suppose you can try clearing your cache files and see if it will load correctly then - havnt used IE in a while but it should be tools options one of the tabs on the right clear private data, clear history clear temporary files. In firefox its tools > clear private data.
When you use firefox and it "does nothing" which doesnt really h elp me understand, what does the status bar say durring this time? The status bar is the bottom edge of the window which usually says htings like "looking up www.google.com" "page found waiting for host" or "loading from analytics.google.com" etc etc etc.
I'm curious which step firefox is doing nothing on. Also, do you see the circle in the top right spinning while it tries to go to the site?