today I've one subnet with one 1232AG running IOS 12.3(8)JEA and one Apple Airport Extreme. Both are configured as follows :
- Same channel (tested with different channel)
- WEP 40bits. Open authentication for 1232AG
- Hidden network
- Just enough power to have a little overlapping zone
I use one Apple MacBook (Atheros AR5006X chipset). When I'm connected on 1232AG, after restarting my computer, I can roam to AirPort and back again. When I'm connected on AirPort, after restarting my computer again, I can't roam to 1232AG.
I would try enabling WDS to use between the two, if that is at all possible. I know that there are instructions available to get the Airport to work with other brands over WDS, but I don't know if Cisco will do that. I am just throwing this out there.