Disklavier

Any users of Cakewalk may be able to help with this. For most midis, 
moving the Acoustic Grand pieces to tracks 1 or 2 is good enough to 
allow the Disklavier to play them. However I found a few that just 
won't save to disk that way. When I reopen the file, the first four 
tracks are empty again. 
I uploaded a file to the site named "absentfriends.mid. It's in 
Yamaha format. If anyone could take a look I'd appreciate it.
Thanks in advance.