Hiya RC Very few folk use the audio facility on the KN7000 it seems so you've got me!!!
The Lexar is a low spec SD Card and some of this type just do not work with SD Jukebox.
The following is a quote from someone using a Lexar SD Card for a different purpose...
I had high hopes for this bargain-priced 1GB SD card, which I purchased to use w/ my flash-based MP3 player. Unfortunately, the card doesn't work properly. Once I write the music files to the card (a VERY slow process, taking about 10 minutes to write the entire card, given the turtle-like write speeds), my player doesn't see about half of the tracks/albums. I've tried emptying and rewriting the card multiple times, as well pulling all of the tracks out of their album directories and writing them to a single, top-level directory, all for naught. I can't discern any rhyme or reason as to what it recognizes and what it doesn't, which changes each time I rewrite the files. I also have twice run into mysterious errors ("Cannot create file or directory") while trying to write to the empty card. I'm stymied, and will be returning the card.
May I suggest you purchase a Sandisk SD Card - they work every time...
Rog
_________________________
Roger M