OK (gawd I hate windows live email!)
I have not got windows live mail here, and I don't use it at all, so this is the best I can do from memory!
you basically need to modify you account details so the server name is smtp.aol.com, not
[email protected]
So, click on the tools menu > accounts then when you get a list of your mail accounts click once to highlight the correct one (probably the only one) and click the properties button... once the properties have opened then find the outgoing server (SMTP) name and change it to remove the @ sign from the name and replace it with a . click OK a few times and try again.