So twice now I have plugged my Looptimus into my mac to get ready for a worship set and I can't get the looptimus to respond. It 'turns on' but it doesn't seem to register when I push buttons. The first time, I restarted my computer and it began to work, but the second time that did nothing. I have checked and rechecked the settings in ableton for the controller and it all seems to be fine. Am I missing something obvious?