I had the same issue. I think Tesserax is right. I'm running PC so what I did was I downloaded AirPort Utility for PC (I have no idea how to check which one is the latest so I got v. 5.6.1) and then selected
1. "Manual Setup"
2. Entered password (if you have one for ur Airport Extreme (AE))
3. Selected "Internet" tab at the top
4. Selected "DHCP" tab under that
5. Changed the "DHCP Beginning Address:" to "192.168" (thx for the hint Tesserax)
After that I had a few issues trying to get my PC online with my AE (probably because I had my printer directly connected to my PC and the AE disconnected.... genius!) but my printer pretty much immediately "awoke" and printed the 3 day old pending page that we had already forgotten what we printed (surprise!).
Hope that helps. 🙂