Resolution
In order to upgrade the image file on the Access Point (AP), refer to the Copying Image Files by Using TFTP and Working with Software Images. sections of Managing Firmware and Configurations.
Note: For a list of software images and supported upgrade paths, refer to the release notes for your AP and look for the Product Features and Model Numbers section of Cisco IOS Software Deployment Release 12.3(4)JA.
For more information refer to these documents:
Problem Type
Upgrade
Products
Access point