I have an (old) Roland Boss Dr. Synth DS-330, an (old) Roland D-20 keyboard, and an (old) Roland PD-5 pedal board, connected by MIDI 5-pin. For years they've worked fine with the Dr. Synth sending to both the keyboard and the pedal board (which I use as bass) -- until someone else moved them. Don't know if someone played with buttons or what. Although each component is working by itself, Dr. Synth isn't telling anyone anything! After over two weeks of trying to get things right, apparently I need help with settings. I'm extremely frustrated and if a gig comes up I'm . . . well, you know. I need to get things to "play nice" together again. HELP!