Loading External SWF and setting variables

Question

Hello Everyone.
I'm sure you are all a where of the FlashVars attribute for
Flash embeds which holds variables for SWF's when they are
rendered. I'm attempting to load an External SWF dynamically
from within my own SWF and need to provide it with the values
normally stored in the FlashVars. For the example below I
wait until the External SWF is completely loaded using the
onLoadInit event from moviecliploader and then i attempt to
set the required variables that the loaded SWF needs. This works
great in test and debug mode (ie. Test Movie and Debug Movie
from the Control menu), but when i publish my FLA to SWF and run
the SWF the variables will NOT get set in the loaded External SWF.
From my readings ive people have mentioned that the player is only
able to access Methods of an External SWF. If this is the case then
how do they expect people to set the FlashVars of dynamically
loaded SWFs? I investigated the loadVariables procedure as well and
had the same results in test mode and was wasn't reliable because
of timing issues.
The sample source is below... if anyone has any ideas or has
come across this issue before, I would really appreciate some
insight.
Thank you in advance for your time.
var loader_mc:MovieClipLoader = new MovieClipLoader();
var mclListener:Object = new Object();
loader_mc.addListener(mclListener);
mclListener.onLoadProgress = function(target_mc:MovieClip,
numBytesLoaded:Number, numBytesTotal:Number) {
// DO NOTHING
mclListener.onLoadComplete = function(target_mc:MovieClip) {
// DO NOTHING
mclListener.onLoadInit = function(target_mc:MovieClip) {
// WORKS IN TEST MODE NOT IN PUBLISH/SWF MODE
target_mc._root.param1 = "value1";
// WORKS IN TEST MODE NOT IN PUBLISH/SWF MODE
_level0.container_mc.param1 = "value1";
this.createEmptyMovieClip("container_mc",
this.getNextHighestDepth());
container_mc._lockroot = true;
loader_mc.loadClip("somecoolflash.swf", container_mc);

Answer 1

I've tried that as well and it behaves the same as onLoadInit
... Works when i test but doesnt when i publish to a swf. I think
this is security related and the flash player just cant write to a
loaded swf and set variables.