Can't connect to Extreme
I just bought one of the new Airport Extreme Dual-band base stations and it set up fine.
Before I set up the new one, I changed the name of the previous Extreme (which was working fine, just too slow because it was last year's model), to avoid possible conflicts, updated it and then used the "reset to factory settings" to make sure it was no longer set up to create the network. Updated again, it came up with a request to create a network just like it should. So I unplugged it to set up the new one.
After installing the new Base Station, I plugged in the previous one (model A1408) but Airport Utility doesn't see it on WiFi.
If I plug it into Ethernet then it is visible and can be set up, but only as an Ethernet extender. I can't configure it as a WiFi extender. So I did a factory reset and I still have the same problem. It keeps telling me there's an "error reading the configuration file." I've now done the factory reset about 10 times, no change in behavior.
Can someone help out with this? I'm at a complete loss what to do now.