I have background music running like this:

my_sound = new Sound();
my_sound.attachSound("background");
_root.my_sound.start(0,1000);

and onto another movie clip I have the following stream video runnig like this:

var conexion:NetConnection = new NetConnection();
conexion.connect(null);
var stream:NetStream = new NetStream(conexion);
cocineros_adsl.attachVideo(stream);
stream.play("images/cocineros_adsl.flv");

Finally I have a button to stop the background music like this:

_root.my_sound.stop();

The problem is as it follows: while I'm playing a streaming video and I hit the stop button the streming stops too.

Some idea about what's going on?
Thanks