I have tried to download books to my kobo and get an error message that the document is not currently authorized to my adobe ID.

I have already contacted Kobo who told me to uninstall the ADE 4.0 and install the ADE 3.0.  I've done this, and nothing.  I've erased the authorization for the kobo that was still there, and authorized it again.  Everything is authorized.  I've even tried borrowing a second book and downloading.  These books are showing in my ADE as being in the kobo.  On my kobo ereader device, the icons for the book are black.