1. Enable global DHCP server on the controller
2. Set the AP to factory default settings:
a) Press RESET and keep it down
b) All LEDs will turn on
c) All LEDs will turn off
d) all LEDs will start blinking slowly
e) On the third slow blink release Reset
3. Connect AP directly to the controller port 1 (of course you need to power it up somehow)
Does this work?