Well I have my PCs networked and acessing AOL fine even on a non-supported(at the time of installation) Netgear DG834G router.
If you follow through the procedures they show to set up the supported systems you should be able to get sorted.
Failing that try the people you bought the router from (I used DSL Warehouse and they were very helpful) or the manufacturer. AOL is one of the big players in ISP so the manufacturer will probably be able to help.
I do remember there was a setting that is different on AOL from most other ISPs which should help but alas I can't remember what it is.