Keybow 2040 Not working with Keycode.LEFT_CONTROL or Keycode.CONTROL

Im modifying the script and have changed a bunch of commands but the only one not working is Keycode.CONTROL (I have tried using Keycode.LEFT_CONTROL) the keybow lights stay off but i get the circuitpy folder when plugged in. If i remove the Keycode.CONTROL element, it springs to life. Can somebody help me?