Controlling a movieclip added whit addChild()

[albegago]

Hi:

In my library I have a symbol.

This symbol class is:

xmx

I export this symbol for actionscript.

I export this symbol in the first frame.

In the main time line i have a movielcip named: mc_mask

Inside mc_mask I use this code to duplicate "xmx" movieclip inside "mc_mask" moveclip:

* * * * * *
BEGIN CODE
* * * * * *
var x_pos:int = 0;
var y_pos:int = 0;

var i:int;

for(i=1; i<6; i++)

{
var new_img:xmx=new xmx();

new_img.name="pic"+i;
// set a name for the new movieclip

new_img.x= x_pos;
// set x position for the new movieclip

new_img.y= y_pos;
// set y position for the new movieclip

x_pos += 20;
// increment in 20 pixels the x position for the next movieclip

addChild(new_img);
}


* * * * * *
END CODE
* * * * * *


It works. It duplicates "xmx" movieclip inside "mc_mask"

But..............


I CAN NOT control the movieclips inside mc_mask...


I have tried:

a)
mc_mask.pic1.alpha = .1;

and does not work....


b)
mc_mask[pic1].alpha = .1;

and does not work....


c)
mc_mask["pic1"].alpha = .1;

and does not work....


c)
mc_mask['pic1'].alpha = .1;

and does not work....

d)
pic1.alpha=.1;

and does not work....

Whe I publish my movie appears this error message:

Error #1010: A term is undefined and has no properties



How can I controll the movieclips CREATED WITH ACTION SCRIPT that are inside another movieclip?


If I MANUALLY put an instance of "xmx" movieclip inside "mc_mask" movieclip and assign an instance name (for example pic1), I CAN CONTROL IT with:

mc_mask.pic1.alpha = .1;

But i want to add the "xmx" movieclip using ACTIONSCRIPT...


Thank You in advance