Hi Alan
Just a thought - something that worked once for me. Put the utterly blank SD Card into your KN7000 and save your whatever current live play registrations/settings to it in folder 1 song 1.
Now use the SD Card in SD Jukebox again and see if it now stirs anything - incidentally I trust you have SD Jukebox pointing at the correct USB port (e.g. 'D') where you connect with the Panasonic Reader.
Rog