Mailist to discuss all issues regarding the Digitech GSP-2101 Guitar FX Processor

I have a 2101, and a Marshall JMP-1 preamp.  I have them midi'd 
together with the control one foot pedal, but I cannot figure out how 
to simply set the control one to not only switch between patches on 
the 2101 for me but also switch between patches on my JMP-1.  I know 
this must be possible,  but I cannot really find what seems to be the 
answer in the manual.  Can someone point me in the right direction 
please?  thanks!