I had the same Wifi issue when I first bought my WS-2000. Finally figured, why not enter it as a hidden SSID. Then it asked for a password, which I don't need or use, living so far out in the woods, no worry of anyone poaching my Wifi. So I entered a few letters and numbers randomly in that field so I could advance to the ENTER. BAM! That not only worked, my other Wifi's showed up too.
After a recent firmware update, I had the same problem. Again even. Repeated the steps and got the console to see the Wifi and all is good again.
I have an Xfinity Comcast Gateway MB3 or M3B or some such unit. Has a RJ11 for a telephone as I have internet, wifi, telephone and TV all from them. No cell phone coverage way out here either, so I've been thinking of getting one of the Xfinity/Comcast smart phones. No idea what I'd do with it though. My son gave me a smart phone, no service on it, for the wifi so I can download the Wifi firmware for the WS-2000.