Setting up the Fitbit Aria with Comcast / Xfinity

I got the FitBit Aria and had some trouble setting it up with my WiFi network.  At first I was getting the "WIFI ERR" message from the scale.  It turns out that if you have a relatively new cable box / wireless router from Comcast / Xfinity, it does not enable 802.11b by default.  The way to fix this is explained here:

http://customer.comcast.com/help-and-support/internet/about-the-wireless-gateway/

After I made the changes to the router configuration, the FitBit Aria worked.

I wasted a lot of time wondering why it was trying to connect to my neighbor's WiFi instead of mine.  It was just because of 802.11b needing to be enabled.