FLVPlayBack doesn't work

[trankennykhang]

Hi all,
I drap FLVPlayback component to stage and add some code as below


var my_nc = new NetConnection();
my_nc.connect(null);
var my_ns = new NetStream(my_nc);
my_video.attachVideo(my_ns);
my_ns.setBufferTime(5);
//Playback FLV file.
my_ns.play("MAMMAAND.flv");

Then, I test movie. I can hear voice of movie, but I can not watch movies. The FLVPlayback doesn't work.
I would be appreciated if anybody can help me fix this problem. Thank you.