How do I authorize my Kobo Glo for ADE library books?

I'm trying to transfer a library ebook from Adobe Digital Editions on my laptop to my Kobo Glo, but can't figure out how to authorize the ereader for ADE.
According to the Kobo website, I'm supposed to....
1.
Launch ADE - that works
2.
Attach Reader to laptop with USB cable. - that works
3.
Select "Manage Library" - not an option.
The Glo asks if I want to
connect to manage files. When I choose
connect, it then shows a black screen with
connected and charged showing. It won't leave that screen. I have to go to the Kobo software installed on the computer to eject the ereader.
When the Glo is finally turned on, I can't seem to find the
Manage Library option. The choices under
Library are:
Books, News & Magazines, Previews, Shelves. I've looked in Settings > Account, and there's a section that says
Adobe Authorization / Not signed in.