Cannot open document on Kobo - protected by Adobe DRM

I have just purchased a second Kobo Touch. I have authorized the device successfully.  However, when I try to read a library book transferred to the Kobo, I get a message "Oops! This document couldn't be opened" and an explanation that it is protected by Adobe DRM and not currently authorized for use with this Adobe ID (the one I used to authorize it!).  The original Kobo still loads fine.  Any suggestions?

Thanks