RH 9 and Cisco Aironet 350
Check the firmware on the PCMCIA card. The latest Cisco tools for Windows automatically upgrade the card firmware to some 5.x.y version. The linux drivers support only an earlier version of the 350 firmware (some 4.25.x). You can go to the Cisco site, use the software selector tool and find the correct firmware by setting Linux as the OS choice.
Hope this helps....