Hi Albert.
Sorry to hear about your problem, and most likely
there is a solution to it.
I don't have a KN6500, and there may be something
who is different from the KN5000 when copy like
this.
Are you sure you've chosed all nessesary filetypes
when load from the HD, i.e. "all" just to see if
that may be the cause to your problem?
happy playing

GJ