problemi con il preload

[cps]

1° frame
percentuale = Math.round((_root.getBytesLoaded()/_root.getBytesTotal())*100) add "% caricati";
_root.loader.gotoAndPlay(Math.round((_root.getByte sLoaded()/_root.getBytesTotal())*100));

secondo frame
if (_root.getBytesLoaded()==_root.getBytesTotal()){
nextScene();
}else{
gotoAndPlay(1);
}