Boss VF-1 Effect Processor

I am trying to use a FCB1010 with a Boss VF-1 simply to switch banks,
patches and control volume. So far it is baffling to me. Mainly need
help how to configure the VF-1 to recognize an expression pedal on the
FCB1010. I was doing fine with a Digitech Control 8 and set the VF-1
to MIDI 7 for the expression pedal in each patch. But I like the 10
patch switches of the FCB1010 much better. Just need to get one of the
expression pedals going.

Thanks, David Spangler in Texas