CE_COPY_NOT_ALLOWED Nook

Adobe Digital Editions is authorized

Nook is an authorized device (shows my AdopeID)

When I drag a book from ADE to Nook, I get error message CE_COPY_NOT_ALLOWED

Have closed ADE, disconnected Nook, shut down Nook, opened ADE, turned on Nook, cabled to my pc, Nook appears on device list, drag the book. No can do.