Abe, another thought. The KN2000 is particular about how the disk is formatted.
I have not had any problems using re-formatted 1.44 disks with tape over the hole as long as they are formatted by DOS (not windows).
Restart your computor in DOS mode and at the prompt, type: FORMAT A:/U/F:720
Copy the files to that disk using windows explorer and see if that works.
Walt