I recently got my hands on a pair of R300 AP's. I have upgraded these with the software version Release 220.127.116.11.1347 (Solo AP) to configure them as solo AP's.
I tried to configure a 2.4 GHz AP with WPA2 PSK AES encryption but my connection with the AP then resets and nothing is changed. I can activate an 2.4 GHz AP with the encryption method set to disabled.
So I guess I missed a setting somewhere, any thoughts?