make sure you set a delay time between each email you send, if you seem to have lots of members at aol, try sending to them at different times of day, make sure your headers are very well constructed following rfc standards (aol knows most spammers are unprofessional and make bad emails). make sure you have no X-Anti-Abuse headers in the email, and if necessary, spoof the X-Originating-IP header in each email.
contact aol and tell them you aren't spamming, say these people are on a list.
thats a start based on the little info i know about the list and how you sent them.