Just a quick reminder note about something I've run into with Aerohive a couple of times. If you get too anxious and start changing the config and rebooting quickly, the APs will get confused and seem to go into a waiting period. Things will behave oddly, and you'll get error messages like "There's an admin modifying the config", or something to that effect. Just be patient, and either wait for or perform a full reboot. And then be patient. It seems like these things just need some time to get caught up occasionally.
Also, I ran into a situation where non-Apple devices would connect fine, but all Apple devices would either say "Unable to join" or "Incorrect password". No rhyme or reason to it. Eventually, after several reboots, the Apple devices magically started working. Again, just be patient. It's not like applying changes to a standalone AP, or even a local controller. There's that Internet thing getting in the way!