I have a cue list assigned to a fader sub on an Ion. I want to remove it so that I can use it as a sub. I've tried what the manual says to do and I've also tried "deleting" the sub. So far nothing's worked-- cue list is still there. I'm obviously not doing something right or leaving something out. The one thing I do know is when I hold down "Fader Controls", even before I press "Release" the sub LCD's go blank as if I'm changing fader pages. Can someone point me in the right direction.... PLEASE?!?!