I am trying to load a midi file from disk and get the SY85 to play it on seperate channels.

I renamed the file to SONG.X01 and load it using the load other selection on the keyboard. It loads ok but when you try to edit a voice it changes both tracks not just the one. Does anyone know what I am doing wrong or maybe a website that has alot of helpfull info on Yamaha keyboards.
I am new to this stuff as I am sure you can tell, any help is very much appreciated

Mark