Connecting to internet with Ex6120 (AC1200)

I just set up my new range extender (model EX6120 - Dual band extender) however everytime I attempt to connect to it (on either band), it asks for the security key, after it accepts it, it then pauses then notifies me of one of two things:

first is http://i.imgur.com/XooZ7NA.png Indicates "Some information changed since you connected. We need additional information to complete the connection" (Note: Have gone through the set up process multiple times trying to figure this out.) - when you enter the security key in again you get the same message.

The second notication is http://i.imgur.com/gU8Qt8Z.png - which simply indicates that it cannot connect to the server.

The range extender is currently plugged in roughly 1' away from the modem/router and my computer was on a desk directly above them and the setup indicated that it was completed (multiple times)

Would someone explain what I am missing?