Basic http call doesn’t even work … HELP!

Something’s not quite right with my setup. I don’t know what I screwed up. First let me say that, in addition to EMS, I’ve also installed the Web UI and the Web Services, following the directions in the PDFs. All of this has been installed on one windows box with IIS. The Web UI works fine both on the server box and from another computer. (I’m still stuck on how I’m supposed to use the web services to receive Event Notification, but that’s another topic). From the server, I can successfully run the following command from my IE browser:

http://localhost:7777/version

But I can’t for the life of me run it from another computer. I know that I can connect to my server, since I can access the Web UI in my browser with:

http://192.168.1.161/EMS_Web_UI/index.php

But, when I try the following, I get the "This page can’t be displayed" error:

http://192.168.1.161:7777/version

What have I configured wrong? It’s not the firewall on the server, because when I turn off the firewall, I still get the same error. EDIT: Oh, but when I try to run it with the IP, instead of localhost, from the server, it doesn’t work either! But the Web UI will work from the server using the IP instead of localhost! Thanks, ~~Bonnie