Have you tried hard resetting the AP by holding down the reset button for 10 seconds.
Are you configuring it through a connection to the configure-me ssid or are you connected via a lan cable.
I always configure them when connected to the AP with a lan cable as the AP is visible on 192.168.0.1. You need your machine set to 192.168.0.3, with a sub mask of 255.255.255.0 and def gateway of 192.168.0.1. The AP obviously needs a power supply or you can use a poe injector. I find this the failsafe way in case of configuration problems.