Scaling mc

Hello Everyone,

I have a mc on stage with an instance name of slide_mc. It must scale and stop when it has reached a certain width. It scales but it does not want to stop. Here is my code:

var my_x = 60;
slide_mc._x = 13;
slide_mc._width = 1;

slide_mc.onEnterFrame = function(){
	slide_mc._xscale += my_x
	if(slide_mc._width == my_x){
		delete this.onEnterFrame
	}
}