I'm afraid I,m a little confused now. You say you can't connect to aol, yet you are able to connect to the internet via a web browser, as can others through your wireless connection.
Do you mean you are having problems logging in to the aol specific software (which some would see as a boon)? It sounds as though you are still connecting to the internet via aol, as when you set your router up you would have needed to put in your aol user name and password if that is your ISP.
If it's connecting to the aol software that is the problem, try re-installing it, either from a disc or by accessing their site via IE or any other browser.