Can't configure wireless security

Hi,

I've been using an Airport Extreme station for several years and I was rather happy with it.
A few months ago, I upgraded my ADSL service and got some free Netgear box that has a modem + a wireless router. I thought I might as well give it a try and use it instead of my Airport box.

Anyway, it seems to me that the reception isn't that good with this box, so I thought I would just turn the Airport back on - and use it as a wireless router (while the Netgear remains the modem).

I have no idea why (and I tried like a zillion options), but since I have turned the Airport back on today (and connected it to the Netgear box via the relevant slot), it doesn't let me configure any sort of wireless security. When I try turning on WPA encryption through the setup wizard, it keeps telling me that I haven't named the network (I did - in one of the first steps in the wizard). Even if I do the setup manually and enter a network name - the wireless encryption options are not accessible. Totally weird!

I tried resetting the device (multiple times), upgrading its firmware and many other ideas I had - nothing seems to work.

Assistance would be appreciated :/

 

What do you mean?

 

Thanks! I will try this...

 

FYI:
Disabling the NAT didn't help, but updating the Airport Utility to the newest version that was recently released - did the trick.
Thanks.