We've got a few Intranet apps we've written, which run on one of our Windows 2003 R2 Servers. My colleague made some changes and put it onto the server, then tried testing it. She usedhttp://localhost/OurWebApp/, but it failed, saying "Internet Explorer cannot display the webpage". Firefox gives an error of, "Unable to connect: Firefox can't establish a connection to the server at localhost". And then trying just http://localhost, we get the same error messages. However, if we use the server's name (http://ourserver/OurWebApp/) it works fine.
Why is that? What's causing this and how do we resolve it?