CurrentTarget is undefined

Question

HI I'm trying to make a game and when you click the mouse on a certain target it's suppose to set the currentTarget equal to a number that represents the movie clip you clicked but it's not working, the number comes up as "NaN" not a Number. Anyone know what I'm doing wrong? Thanks, here's the function I'm having trouble with:
public function clickBeast(event:MouseEvent) {
// prevent mouse clicks while showing sequence
if (gameMode != "replay") return;
var thisBeast:String;
var value1:Number = repeatOrder.shift();
if(value1 == 0){
thisBeast ="Cat1";
}else if((value1 == 1)||(value1 == 2)||(value1 == 3)||(value1 == 4)){
thisBeast ="Dog1";
}else if((value1 == 5)||(value1 == 6)||(value1 == 7)){
thisBeast = "Cat2";
}else if((value1 == 8)||(value1 == 9)){
thisBeast = "Dog2";
}else if(value1 == 10){
thisBeast ="Cat3";
trace (thisBeast);
var thisBeast2:String;
var value2:Number = event.currentTarget.beastNum;
if(value2 == 0){
thisBeast2 ="Cat1";
}else if((value2 == 1)||(value2 == 2)||(value2 == 3)||(value2 == 4)){
thisBeast2 ="Dog1";
}else if((value2 == 5)||(value2 == 6)||(value2 == 7)){
thisBeast2 = "Cat2";
}else if((value2 == 8)||(value2 == 9)){
thisBeast2 = "Dog2";
}else if(value2 == 10){
thisBeast2 ="Cat3";
trace (value2);
trace (thisBeast2);
// correct match
if (thisBeast2 == thisBeast) {
beastOn(event.currentTarget.beastNum);
// check to see if sequence is over
if (repeatOrder.length == 0) {
nextTurn();
// got it wrong
} else {
textMessage.text = "Game Over!";
gameMode = "gameover";

Answer 1

You cannot treat an interactive object as a Number, and I don't see where the code you have tries that.  If you are talking about the beastNum property that you try to utilize, it might be a case of how you define/assign that value.  So you might need to explain that.
For the first lines in that function put...
trace(event.currentTarget);
trace(event.currentTarget.beastNum);
For the first line it should output the object that was involved with the event.  What does the second line produce?