Thanks for your reply Michael.
It is a L2 adoption I was attempting.
I have ended up downgrading the controller to WiNG 4 and I am now able to adopt all my AP300.
I found the following in the 5.21 system guide:
Begining with WiNG 5.2 adoption of AP300 Access Points are supported in a limited capacity. The following is a list of AP300 and WiNg 5.2 features and functionality that are not supported on AP300 in WiNG 5.2:
� Self Healing
� Enhanced Beacon and Probe Table
� Adoption and upgrade of pre-WiOS AP300 devices
� Layer 3 Mobility
� WLAN bandwidth allocation
� 802.11k
� Smart-RF
� RF Domain Support
Could my old 2005 AP300 be "pre-WiOS? Do you know what WiOS is?
Thanks
Chris