Hit test point problem

1

i have a setup like this, when the mouse cursor is invisible I put movieclip on stage like so:

stage.addEventListener(MouseEvent.MOUSE_MOVE, redrawCursor);  
function redrawCursor(e:MouseEvent):void {
        if (imageLoader.hitTestPoint(mouseX, mouseY, true)) {
            Mouse.hide();
            message_mc.visible = true;
            message_mc.x = mouseX;
            message_mc.y = mouseY;
            e.updateAfterEvent();
        } else {
            Mouse.show();
            message_mc.visible = false;
}

but for some reason the movieclip its flickering all the time on and off when i move the mouse, and on some places when i stop the mouse not even showing…
does anybody know why is this happening?