Ensuring the country codes are correct will allow the AP to broadcast. You need to make sure the hardware is supported in the regulatory domain regardless however.
You can check the allowed channels for a domain and AP type using the following command:
show ap allowed-channels country-code UK ap-type ap-105
Only certain AP typres are approved for use in selected regulatory domains.
What is the AP mode, the regulatory domain you wish to use it in and the version of ArubaOS you are running?