Nook not showing as device in menu

I have a nook glowlight plus.  It has an active authorization code, yet will not display in ADE menu - therefore I cannot transfer books there.  Have tried uninstalling/reinstalling ADE already.  Library book shows properly on shelf - but no sign of nook so unable to drag/drop to read it there.  Even tried rebooting.   Barnes and Noble said to contact Adobe customer service.   Customer Service said had to post question here.  Unhappy - to say the least.  Never had issues with previous nook.