Javascript HTML5 removeEventListener of button fails

I have three cases that either addEventListener to five buttons or addEventListener to certain buttons or removeEventListener from all buttons. However, I failed to removeEventListener from the buttons. What's wrong with my code? Please help, thanks!

var set = true;
var showFeedback1 = showFeedback.bind(this, 0);
var showFeedback2 = showFeedback.bind(this, 1);
var showFeedback3 = showFeedback.bind(this, 2);
var showFeedback4 = showFeedback.bind(this, 3);
var showFeedback5 = showFeedback.bind(this, 4);
stage.addEventListener("tick", checkShowFeedback.bind(this))
function checkShowFeedback() {
// s2 currentRound 1 4 7
if (set) {
if (currentRound % 3 == 1) {
console.log("currentRound % 3 == 1");
for (var i = 0; i < 5; i++) {
if (tempS < 60) {
console.log("temps ", i);
this.scoreSheet_label.gotoAndStop(0);
this.scoreSheet_label.visible = true;
switch(i){
case 0:
this.feedbackCategory1.addEventListener("click", showFeedback1);
break;
case 1:
this.feedbackCategory2.addEventListener("click", showFeedback2);
break;
case 2:
this.feedbackCategory3.addEventListener("click", showFeedback3);
break;
case 3:
this.feedbackCategory4.addEventListener("click", showFeedback4);
break;
case 4:
this.feedbackCategory5.addEventListener("click", showFeedback5);
break;
}
}
}
}
// s3 currentRound 2 5 8 9
else if (currentRound % 3 == 2 || currentRound == 9) {
console.log("currentRound % 3 == 2 || currentRound == 9");
this.scoreSheet_label.gotoAndStop(1);
this.scoreSheet_label.visible = true;
this.feedbackCategory1.addEventListener("click", showFeedback1);
this.feedbackCategory2.addEventListener("click", showFeedback2);
this.feedbackCategory3.addEventListener("click", showFeedback3);
this.feedbackCategory4.addEventListener("click", showFeedback4);
this.feedbackCategory5.addEventListener("click", showFeedback5);
} 
else {
console.log("else");
this.scoreSheet_label.visible = false;
this.feedbackCategory1.removeEventListener("click", showFeedback1);
this.feedbackCategory2.removeEventListener("click", showFeedback2);
this.feedbackCategory3.removeEventListener("click", showFeedback3);
this.feedbackCategory4.removeEventListener("click", showFeedback4);
this.feedbackCategory5.removeEventListener("click", showFeedback5);
}
set = false;
}
}
function showFeedback(i) {
category = i;
this.left_arrow_scoreSheet.visible = false;
clearGraph();
this.feedback.visible = true;
triggerShowFeedbackSentence = true;
}