Video Loaded Help!

How do I remove the video on the other pages?

I have this video I’m loading on a particular video page. It plays fine on that page, but when the user clicks to another page the video is still showing.

var nc:NetConnection = new NetConnection();
nc.connect(null);

var ns:NetStream = new NetStream(nc);
ns.client = {};

var video:Video = new Video();
video.attachNetStream(ns);
video.x = 150;
video.y = 90;
video.width = 640;
video.height = 480;
addChild(video);

ns.play(“video/make_believe.flv”);

I tried using the removeChild action on the other page frames, but get this error:

TypeError: Error #2007: Parameter child must be non-null.
at flash.display::DisplayObjectContainer/removeChild()
at Mission_Noir_fla::MainTimeline/frame30()
at flash.display::MovieClip/gotoAndPlay()
at Mission_Noir_fla::menubuttons_1/aboutClick().

Again how do I remove the video on the other pages?