I really hope someone can help

. I had to do factory reset on my aura hd, did reset, kobo updated, used calibre to dump my books on it, fine. The problem showed when I tried to open ade protected books. Kobo says it's authorized, but when I try to open the book, the book says it's not??
I deleted authorization, authorized via ADE again, got same result.
I deleted and readded books, turned kobo on and off, redownloaded book from kobo to try. Should I downgrade firmware? Try again in different sequence?
the books from kobo open nicely on pc.