It's not the AOL setup. Use "other." It's IMAP.
Incoming Mail Server:
Host Name: imap.aol.com
User Name: *your user name* (no "@aim.com" or anything.)
Password: *your password*
Outgoing Mail Server (SMTP):
Host Name: smtp.aim.com
User Name: *your user name* (no "@aim.com" or anything.)
Password: *your password*