Flex :: Recorded Audio Playback Cuts At End

I'm writing a flex app, which must record an audio and then playback. It records just fine, I can hear the flv on the server, but when it comes to the playback it cuts the end a little bit, and each time I ask to reproduce again it cuts a little bit more. I guess it's something related to buffer management, but I don't know exactly.

Here's the code I'm using to playback. It is called from a mediator:
var streamPlayClient:Object = new Object();
this.stream.client = streamPlayClient;
streamPlayClient.onPlayStatus = function(infoObject:Object):void {
if (infoObject.code == "NetStream.Buffer.Flush") {
stopPlayback();
}} this.stream.play("flv:" + this.streamName);