[RESOLVED] Phone WiFi issue

Well, I'm moving into the modern era, and the technology is fighting me all the way. My phone sees the WiFi network, but refuses the password. I'm not even sure how to study this further. I have two Surface Pros also connected to the network. I checked that the password on those was the same as the one that I was using (in case I had written something wrong), and I can't find any issues. Tried a dozen times, too.

Any suggestions as to how I can even investigate this further?