I have just bought an Airport Extreme device from APPLE, I followed all the instructions as the manual indicate, and it is really a weird situation, and I will try to explain as better as I can:
1.- I connected through an ethernet cable from one of the ethernet ports of my DSL Modem to the WAN port of the Airport extreme, as I show inthe pics.
2.- I installed on my Windows 7 laptop the utility "AirPort" and it recognizes the Airport device, but The "orange light" always stays in blinking, and when the utility tries to access to the Extreme airport, I get an error "-4" that says that it canot find in the network the device.
3.- The weird thing is that when I get associated to this device , I get connected to the Internet without problems , I mean, I can surf through the internet using the Apple airport device!!. But I can not configure in manual or assited way either.
4.- Restarted every device and I get the same error, I am really frustrated , because it is supposed that this process would be so easy.