Scoping Question when one movie loads a second movie

Question

I have a movie that is just a preloader for the main movie.
This preloader movie has the loader and progress bar components so
that I can show the process of the main movie loading. When I load
a sound file in frame 1 of the main movie to be used later in the
movie and run the main movie (with out being called from the
preloader movie) the sound will play when it is called (told to
play). However if I call the main movie from the preloader movie,
the sound will not play. To make the sound play I have to load the
sound in the preloader movie.
I am sure that this is a scoping problem and I am not correctly
coding for the location of the sound.
The code for loading the sound is :
if(_global.Behaviors == null)_global.Behaviors = {};
if(_global.Behaviors.Sound == null)_global.Behaviors.Sound =
if(typeof this.createEmptyMovieClip == 'undefined'){
this._parent.createEmptyMovieClip('BS_sndErrorMsg',new
Date().getTime()-(Math.floor((new Date().getTime()) /10000)*10000)
_global.Behaviors.Sound.sndErrorMsg = new
Sound(this._parent.BS_sndErrorMsg);
} else {
this.createEmptyMovieClip('_sndErrorMsg_',new
Date().getTime()-(Math.floor((new Date().getTime()) /10000)*10000)
_global.Behaviors.Sound.sndErrorMsg = new
Sound(this.BS_sndErrorMsg);
_global.Behaviors.Sound.sndErrorMsg.attachSound("ErrorMsgSound");
if (false) {
_global.Behaviors.Sound.sndErrorMsg.start(0,1);
The code to play the sound is:
_global.Behaviors.Sound.sndErrorMsg.start(0,1);
I would like to keep the preloader movie as small as possible
and don’t want to load any sound files in it.
How do I load the sound files in the main movie and play them
when needed (using actionscripts) from the main movie when the main
movie is loaded from the preloader movie?
Thank you,
Steve

Answer 1

Putting the following code on frame one in the movie being
loaded by the preloader corrected the problem.
this._lockroot=true;
The following is what Flash 8 help file says about
_lockroot
_lockroot (MovieClip._lockroot property)
public _lockroot : Boolean
A Boolean value that specifies what _root refers to when a
SWF file is loaded into a movie clip. The _lockroot property is
undefined by default. You can set this property within the SWF file
that is being loaded or in the handler that is loading the movie
clip.
For example, suppose you have a document called Games.fla
that lets a user choose a game to play, and loads the game (for
example, Chess.swf) into the game_mc movie clip. Make sure that,
after being loaded into Games.swf, any use of _root in Chess.swf
refers to _root in Chess.swf (not _root in Games.swf). If you have
access to Chess.fla and publish it to Flash Player 7 or later, you
can add this statement to Chess.fla on the main Timeline:
this._lockroot = true;
If you don't have access to Chess.fla (for example, if you
are loading Chess.swf from someone else's site into chess_mc), you
can set the Chess.swf _lockroot property when you load it. Place
the following ActionScript on the main Timeline of Games.fla:
chess_mc._lockroot = true;
In this case, Chess.swf can be published for any version of
Flash Player, as long as Games.swf is published for Flash Player 7
or later.
When calling loadMovie(), set the MovieClip._lockroot
property to true in the loader movie, as the following code shows.
If you don't set _lockroot to true in the loader movie, any
references to _root in the loaded movie point to the _root of the
loader instead of the _root of the loaded movie:
myMovieClip._lockroot = true;
Availability: ActionScript 1.0; Flash Player 7