Clarion DC 625

[Sasquatch]

Another question about the unit,  it works great with the one glaring issue. When it starts it is on disk one. However there seems to be no way to switch disks without having to go to last song on disk one play it then it switches to disk two. The get to disk three again go to last song on disk two, play it and  then switches to disk three. Keep repeating till you get to disk six. Or just play the entire disks and on to the next. 

I can find no manual on using the changer from the Yamaha controller. Any thoughts?