ok there are a number of reasons you cant get webpages i'll list them here, obviously you need to make sure you are connected to the internet and can view web pages fine, one thing you can do is try to ping the site to do this
go to start > run > type in cmd or command which should bring a black window open, in here type ping www.angelfire.com (thats ping then a space then the url)
this should send 4 requests to that website, they will either reply or time out or say something like unreachable.
ok if the ping works, you know you can communicate with the website, one thing that you can sometimes try if the site allows is telnet however this doesn't work on this particular site. sometimes security software, and security breaches respectively can cause you to be unable to see a page, such as spyware etc. another things is if your isp has been blocked by the site, which does sometimes happen, i can give you more help with any of this if you require, these are just a few idea's and something to try, hope the information i've give you helps, snipe!