I can upload image but the sprite name remains pict1 each time I upload another image. Why doesn't imgVal function increase?

             function imgVal() 
		{ 
			img += 1; 
			trace("image: pict" + img);
		}

		imgVal();
		_fla.lights_mc.visible=false;
		_fla.lights_mc.stop();
		_fla.pre_mc.fill_mc.stop();
		_fla.pre_mc.visible=false;

		var sprite:Sprite=new Sprite();
		sprite.addChild(loader);
		sprite.name = "pict" + img;

		//trace(sprite.name);
		_fla.myBorder.box.addChild(sprite);

I'd like each sprite to be given a new name like pict1, pict2, pict3, etc but img variable is not increasing. I think this is where my problem occurs. Would someone please help?