FLV Height problem

programming flash
1

i am trying to get the height of an flv, and whenever i try… it comes up wrong for example it keeps coming up with 240 instead of 360 which it should be… any ideas? i have attached code below

import fl.video.*;

var myVideo:FLVPlayback = new FLVPlayback();
myVideo.source = "test.flv";

myVideo.scaleMode = VideoScaleMode.NO_SCALE;
myVideo.align = VideoAlign.TOP_LEFT;

addChild(myVideo);


trace (myVideo.height);

im sure theres a simple solution, but ive spent hours googleing and come up with nothing ;/ thanks in advance!