Can't access E6200

Yesteday I set up an EX6200 as an extender (or bridge) to a TP-Link AC1700 router via the WPS buttons for 2.4 and 5 GHz, then positioned the the unit where I want it. It shows on my Win 7 x64 laptop (wireless connections list). What I can't do is connect to it via wi-fi with mywifiext.net or 192.168.1.250 from a few feet away. This is my first time with an extender, so I'm not sure what to do next. Any ideas? Thanks,