It's your keyboard. This same thing happened to me with my radium 61; Hit Midi select on the controller and you'll see it says A1 set it to A0, look at the keys on your keyboard where there are markings that say velocity, depth, etc.... and look for the sharp and flat keys; this changes from a1 to a0 Or vica versa; I forget which one mine was on but when I did this it corrected the problem. Good Luck