I have a lab of 40 macintosh ibooks running OS/9 with the airport client. We recently replaced the Apple Airports with AP-350s running IOS 12.2(JA). Now, here is the problem. Ibooks running OSX work fine. the OS9's do not appear to be trying to find the APs. However, with the same scenario here in my office; if I turn on the Broadcast SSID option, the computer associates to the access point. If I turn off the Broadcast SSID option, the IBook seems to just do nothing, but it does give a 169.###.###.### IP address. When the Lab Tech took the Ibook back over to the lab, it did not work, even though I had turned the Broadcast on. They need these for a final next week. no pressure at all.
Try disabling the Aironet extensions feature on the Cisco APs. This feature is used by cisco wireless clients to exchange compatiblity information. Some of the non-cisco clients may not work with this feature enabled. Try disabling this. It should work.