ActionScript 3.0 :: Two Functions Running At Same Time With Single Button Press

I have a problem with two functions. This is the story: the user has to press the space button on keyboard when he sees something on screen, then the "rightClick" function is called. If he presses the button when there is something else on screen that is a wrong answer (function "wrongClick" is called). The problem is that when the user presses the space button both function run at the same time.

This is the call of the wrongtClick function on frame 5
stage.addEventListener(KeyboardEvent.KEY_DOWN, wrongPress);
This is the call of the rightClick function on frame 10
stage.addEventListener(KeyboardEvent.KEY_DOWN, rightPress);

Both function are very simple:
function rightPress(event:KeyboardEvent):void {
scorenum += 1;
trace ("Right:",scorenum);
} function wrongPress(event:KeyboardEvent):void {
wrongnum += 1;
trace ("Wrong:", wrongnum);
//and plays a sound too
}