I have been banging my head against the wall for days now on this.
We have 2 identical 1100 APs (I copied the config from one to the other changing names and IP address)
They plug into different 3COM switches (both switches are configured the same).
I have 3 secured SSIDs on the APs and one SSID that is not secure (unbroadcasted). On one AP I can login and I wil go right through radius and authenticate. If I log in and are using the other AP I get "cant find certificate" error. I am going nuts. Same AP configs, same switch configs, same laptop, same username and pwd to login to the laptop. But can't auth in one place over the other. I am going nuts!
I did a bit more testing today and I am thinking that the secret isn't the problem. I think the problem lies in the VLAN configuration.
I added an SSID with no security on it, added it to a VLAN. I connect fine to the AP but dont get an IP address from DHCP. I hard coded my IP from the scope I would have gotten one from. Can't ping anything. Seem like a VLAN config problem?