Android Front Camera Rotation Problem

hi all.i wanna make video chat.i put camera object spark videodisplay.but camera object rotation=-90 image = flat

i try this example tablet image = reverse,

Example image;

private function initCamera():void{if (Camera.names.length > 0) {     cam = getCamera(CameraPosition.FRONT);     cam.setMode(320, 240, 15);     cam.setQuality(0, 90);     var myCam:Video = new Video(camera.height,camera.width);      myCam.attachCamera(cam);     myCam.rotation=-90;     vd.addChild(myCam);     }} 

please help me?