Korg Pa 50- Using A Midi foot controller to trigger Variati

[mikeis01]

Hello I read that you can use a midi foot controller to trigger varieations, fills, and such.....I have a Digitech Control 8 foot controller with expression Pedal.....here is my problem....when I assign midi input channel one to upper I can control volume on upper and program changing on upper.....or assigne channel 1 to the CONTROL and have the pedals on 81-87 change the variations so on and so forth, but no Volume......the expression pedal is assigned to chanel 7 on the foot controller...I want to trigger variations, fills, and such with the pedals and still control volume on the upper with the expression pedal....I know peapole are coming up with very inovative ways to use the behringer 1010 pedal

How do I assign my pedalboard to triger variations and at the same time control upper volume control???

Thanks,
Mike