Has you authorize your Kobo or iPad with the same Adobe ID?
Yes! I have tried to authorize and deauthorize and re-authorize a dozen times. I have done a factor reset on the Kobo and re-loaded all the books. The books from Kobo are fine, I can read them. The books from the library I can read on my computer using Digital Editions but when I put them on my Kobo it says "Oops! This document couldn't be opened. This document is protected by Adobe DRM and is not currently authorized for use with your Adobe ID."