NaN problem... clarifying numbers

Quiz type program [SIZE=“1”]cant attach so i give temp link[/SIZE]

code:
frame 4 code:


var numSuc:Number; //number of successes is a number
var numTry:Number; // number of tries is a number
var percent:Number; // percent correct is a number
btnCorrect.onRelease = function(){
	numTry++; //add 1 to number of tries
	numSuc++;// add 1 to number of successes
	gotoAndStop("question3"); // go to frame 5
}
btnWrong1.onRelease = function(){
	numTry++;
	gotoAndStop("question3");
}
btnWrong2.onRelease = function(){
	numTry++;
	gotoAndStop("question3");
}
btnWrong3.onRelease = function(){
	numTry++;
	gotoAndStop("question3");
}

and what it gives is this:

this is the swf : [http://megaswf.com/serve/30752/]

thanks :slight_smile:
~12sea21