Found this which may be of help
"Seems that if you use their version
of Internet Explorer that is "built-in" to AOL, their proxy servers don't know
what to do with the VPN traffic because the internal addresses being requested
by the applications are not valid on the Internet. To get around the problem
we run IE (and other apps) from outside AOL (start AOL, minimize, then start
IE) and it seems to work fine for browser-based VPN functions."
also check here
http://www.vpn.serveftp.net/php/viewtopic.php?t=11