I have an extremely weird problem thats been going on for a while but is getting worse. I practice by connecting my M-audio keyboard to garageband. Garageband then outputs the sound to my UX2 which then connects to a PA system. The problem is that sometimes (or very often recently) a large pop goes of and once the pop goes of the keyboard still has its blue lights on to show its connected, but playing it doesn't do anything. Here's the weirdest part; if I turn the keyboard on and off it starts to work but the sustain pedal starts working in reverse! No matter how many times I turn it on and off, whether the pedal is depressed when I do this or not, the problem remains. The only way to solve it is to wait maybe 20 minutes or unplug and plug back in the UX2! Its strangest problem and I don't know what is causing it. The keyboard requires no drivers and all mu UX2 ones are up to date. Please could someone make some suggestions as to what the problem might be?