I have three Behringer FCB1010 with Unos 1.02f -and only one is where expression 1 pedal works with KPA.
(and earlier two of these FCB:s worked with G-Major perfectly, one is new one).
The most peculiar thing here is:
-I took sysex copy from the working one (with Ripwerx editor)
-dumped the same sysex to the other two FCB:s
Finally: two FCB:s work in every other way BUT: left expression not working (doesnt matter if I put it to wah or volume)... 
I did calibrate them etc., not working... 
Any suggestions?