Hi Carlo -
From what I can see, going back to the picture of the AP you provided earlier, I only see the ethernet port LED on - not the power nor the radios, which may be just a momentary view of this Access Point. If no SSIDs are broadcasting, I'm guessing the AP is going through a reboot cycle trying to find the controller.
If you have an Extranet account, you should be able to download the configuration guide from the Wireless documents section.
After everything you have tried, I would suggest calling into our Wireless GTAC group for further assistance.
Scott