I play the congas on 103, I change a set, and as soon as I go back to 103 on the Congas, it gets stuck and on all the sensors there is a sound that sounds like a slap...on all the sensors...or let's say I have a chimes that sounds on one sensor , which I have playing for 4 meters for example.. when it gets stuck and I press the chimes to play, it plays one meter and stops.. it cuts out.. as soon as I turn off the machine and turn it back on, it plays normally for a while and then does it again