I have a network with AOL Broadband. Three computers are connected using a hub, with one of them connected to the internet.
I found that for the computers to see each other and for AOL to work, Internet Connection Sharing (ICS) had to be installed but DISABLED. Having done this, obviously there was no internet for the other computers...
To sort that, I downloaded a Proxy server and installed it on the PC with the internet. Once set up I am now able to access the Internet from the other two computers.
It took me five hours to work it out!
Hope that's of help to you!