In the GLOBAL / MIDI SYNC menus of each instrument, do you have PRG CH SEND and PRG CH RECEIVE assigned, respectively?
Also, under MIDI CHANNELS, PROGRAM CHANGE IN CHANNEL and PROGRAM CHANGE OUT CHANNEL should be assigned, respectively.
In the GLOBAL / MIDI SYNC menus of each instrument, do you have PRG CH SEND and PRG CH RECEIVE assigned, respectively?
Also, under MIDI CHANNELS, PROGRAM CHANGE IN CHANNEL and PROGRAM CHANGE OUT CHANNEL should be assigned, respectively.