Trying to use AOHell which is third-party non-microsoft certified software with MSN or any other decent ISP software, will do that. Just because AOL says something will work is a sure indication their claims fall through. Ask the 10s of thousands that switch from AOL forever every year just for that reason (among many others). Uninstall AOL now,and restart your 'puter.
If your using MSN or any other ISP, You need to be running a firewall like free Sygate from
http://download.com - type, sygate, in the Search box, you must be on-line to register Sygate, that is if you're not using a firewalled Router on a Network or, have another third-party firewall like Sygate installed, to protect you and the Internet community from hackers, spammers and terrorist from using your computer for their own illicit needs while you're on-line?
Do a full updated virus scan imediatel. What anti-virus are you using? If you're running Mcaffee or Norton anti-virus and have not recently paid for a one year subscription to download weekly new virus definitions, you might consider getting free AntiVir 6 from
http://free-av.com - Uninstalling Mcaffee; Restarting your computer and installing free AntiVir Anti-virus 6.0.