I have just bought some Technics disks to go with the Pop Keyboard Course used by the Technics Music Academy. I have the course books and I saw the performance disks to go with these advertised on Ebay. The disks are for a KN1000 & KN2000. When I try to load them into my KN7000 I get the message "The data on the disk that you are using is for a different product." I have also tried to load the disks in a KN3000 and KN1400 but the same thing happened. Is there any way the files can be converted so we can use them with the books? Thank you in advance for your advice.