I recently downloaded Tor, but I can't get it to work. When I have it enabled for Firefox, all it does is "load" pages for a long time and eventually Firefox displays Page Load Error. I've played around with the settings, but nothing seems to help. Any help is appreciated.

Did you download the whole software bundle or just the addon?

The bundle.

i use tor every once and a while, you need to start the tor application before you enable it in firefox, click on the onion called vidalia then it should open a window, and hit start tor.