Describe a little bit more please - AOL won`t help you anyway! - how many computers through which type of connections? Cable / Wireless & different computers.
Pure (educated) guess is on the AOL 8 connection make sure the User Name is [your name]@ AOL.COM - type in the full e-mail address rather than just your AOL user Name. AOL routers/Modems add "@AOL.com" automatically. Post back with full details about the connections.