Re: My AP350 is working only in site survey Client mode.. WHY??
There is a dropdown list on the Express Setup screen to define what the "Role in Radio Network" should be: either Root, Repeater or Site Survey Client.
From the home screen, choose SETUP, then EXPRESS SETUP and it should be right there. Choose Root or whatever it needs to be, and click OK. The AP will need to reboot after such a drastic change, but after that, it should be fine.
Since it's a demo unit, contact whoever gave it to you for demo purposes, and they should be able to help you out.