Hey all. I bought a 4 Loooper from Mr. Boggs. It took a hella long time, but it finally arrived today. Naturally I was excited, so I plugged it in, ready to a/b pedals til the stars turn cold, when I wasn't getting any sound out of the pedal. I checked everything, and then started pressing the switches on the loooper. When I pressed the master bypass switch, I finally had sound! However, none of the loops would now work (The MB switch seems to be doing it's job). Turn off the MB, and my signal is instantly cut off. Am I missing something?