Steve,
Voj is correct. You cannot use Avast with AOL email. The reason is this.
Avast email protection depends on the POP3 and SMTP protocols.
AOL does not use them and thus, Avast cannot monitor email from AOL.
However, you can use Avast just dandy as an anti-virus and install a separate email av.
You can contact me, or Technical for suggestions on separate email AVs.
Good luck and thanks for stopping by.
techie101