hitTest not working

programming flash
1

I have the following Movie and Frame scripts, can anyone see why my hit test is not working?

Movie Script:
onClipEvent(load) {
_root.initGame();
}

onClipEvent(enterFrame) {

_root.newPlane();
_root.movePlanes();
_root.movePlane();


// set the cursor
_root["cursor"]._x = _root._xmouse;
_root["cursor"]._y = _root._ymouse;

}

onClipEvent (mouseDown) {
// show blast
_root[“cursor”].gotoAndPlay(“blast”);

// get the location of the click
x = _root._root["cursor"]._x;
y = _root._root["cursor"]._y;

// loop through all planes to see which was clicked
for (i=0; i<10; i++) {

		// see if this was the one clicked
		if (_root["plane"+i].hitTest(x, y, false)) {

			// have the clip play the "hit" animation
			gotoAndPlay(2);

			// increase score and show it
			score++;
		
	}
}

}

Frame Script:
function initGame() {
// init plane variables
nextPlaneTime = 0;
nextPlane = 0;
planes = [];
numPlanes = 10;

}

function newPlane() {
// more planes?
if (nextPlane < numPlanes) {

	// time for next?
	if (getTimer() &gt; nextPlaneTime) {

		
			// create new plane clip
			attachMovie("plane", "plane"+nextPlane, nextPlane);

			
				_root["plane"+nextPlane]._x = -30;
				

			// choose height of plane
			_root["plane"+nextPlane]._y = int(Math.Random()*100)+20;

			
			// add plane to array
			planes.push({clip: "plane"+nextPlane, d: dx});

			// set things up for next plane
			nextPlane++;
			nextPlaneTime = getTimer() + 2000;
		}
	}

}

function movePlanes() {
// loop through planes in array
for(i=planes.length-1;i>=0;i–) {

	// get speed and clip
	dx = planes*.d;
	plane = _root[planes*.clip];

	// move plane AT SPEED OF 10
	plane._x += 10;

	

	// plane exit right
	}  if ((dx &gt; 0) and (plane._x &gt; 570)) {
		plane.removeMovieClip();
		planes.splice(i,1);
	}
}

stop();