netStream.seek?

i am using this script on frame 1 to control playback of an FLV.

rwnd_btn.onPress = function(){
rewindMovie();};
function rewindMovie() {
netStream.seek (netStream.time - 5);
netStream.play();
}
rewindMovie();

the rwnd_btn just pauses the FLV and doesnt do anything else.

i have also tried using other actions like netStream.time + 5 and netStream.close and nothing seems to affect my streaming FLV.

i havent tested it on the net - this has all be local - would that matter?