Can't log in to EX3700 after initial setup

I reset my EX3700 using a paperclip, logged in to http://mynetworkext via my Android phone and made it into an access point (it's on an ethernet connection to my modem and acting as a wap in my garage for my Roku). I then wanted to log back into it via http://mywifiext and www.mywifiext<DOT>net so I could do the latest security updates, but it wouldn't work from my Android phone via Chrome browser, my PC via Chrome or Firefox. All lights on the extender are lit and green. I can connect to the extender's signal very well and access the Internet. Can anyone think of a reason why I can't log in?