Gelöst. 
High und Low in FW umgekehrt
Button pauseButton(buttonPause, 25, true, false);
Button upButton(buttonUp, 25, true, false);
Button downButton(buttonDown, 25, true, false);
#ifdef FIVEBUTTONS
Button buttonFour(buttonFourPin, 25, true, false);
Button buttonFive(buttonFivePin, 25, true, false);