Hey, im having some trouble with my code

I'm trying to make a object be worth points. Here is the code im using, but it doesnt make the score increase, it just makes the 0 vanish after clicking on the item. Then you click on the item again and it says 00, then nothing, then 0 and repeat. Any ideas?

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var currentScore:int;

init(); // this line goes directly beneath the variables

function init():void{ // call once to set everything up

     currentScore = 0; //start with 0 score

     MoneyBtn.addEventListener(MouseEvent.CLICK, addScore ); // clicking on +1

            }

function updateScoreText():void

{

     scoretxt.text = (""+ currentScore); // set the text property of the txtScore

     trace("Score text updated");

     }

     updateScoreText(); // finally, update the text field

           function addScore(e:MouseEvent):void{

     currentScore += 25; // add points to the score

     updateScoreText(); // update the textfield

}