Can't connect Wireless Pro to Mac with USB cable

I am trying to connect my My Passport Wireless Pro to my Macbook Pro with the provided USB cable - per Chapter 7, p. 27 of user manual. It has been connected for 15+ minutes and still the blue light blinks and nothing shows up in the Finder. How do I attach this device???

It was not powered on when you connected it, right?

it was. should I power off, connect, and power on?

power off (no blue lights), connect via USB cable, blue light for drive (not wireless) starts blinking, no connection in Finder