Disklavier

Good morning.  I have been a member of this group for a while but this 
is the first time asking a question and I would appreciate your help.

We bought an upright yamaha piano almost ten years ago with a 
disklavier as an integral part of the system (a player piano).  We have 
been unable to get new disks (I bought the right midi disks) that 
already pre-formated to work in the disklavier.  I am wondering if 
there is a step that I am missing.  Please advise.  Thank you.