使用函数时出现奇怪的NetStream问题

此代码导致我的f4v文件过早停止播放。时间变化,但大约8-10秒。

loadSong();

    function loadSong()
    {
        if(!songPlaying)
        {
            songPlaying = true;
            var customClient:Object = new Object();
            customClient.onCuePoint = cuePointHandler;
            customClient.onMetaData = metaDataHandler;

            var nc:NetConnection = new NetConnection();
            nc.connect(null);
            var ns:NetStream = new NetStream(nc);
            ns.client = customClient;
            ns.play("song.f4v");
        }

            trace("HERE");

    }


    function cuePointHandler(infoObject:Object):void{
    trace(infoObject.name);
    }
    function metaDataHandler(infoObject:Object):void {
    trace("metaData");
    }

这段代码让f4v一直播放到最后世界跆拳道联盟!?当我通过函数调用它时,似乎会导致问题。仅供参考,代码存储在主时间线的第一帧中,F4v仅为音频。任何帮助都将不胜感激。

if(!songPlaying)
{
    songPlaying = true;
    var customClient:Object = new Object();
    customClient.onCuePoint = cuePointHandler;
    customClient.onMetaData = metaDataHandler;

    var nc:NetConnection = new NetConnection();
    nc.connect(null);
    var ns:NetStream = new NetStream(nc);
    ns.client = customClient;
    ns.play("song.f4v");
}