Accessing loaded swf-s dynamic text field

1

Hi

I have a strange problem that i can not solve. I googled i checked this forum and actionscript.org but i can not find solution to my problem. Here it is:
I my main swf i load preloader swf that contains two layers on time line. First layer is gradient shape and second layer is dynamic text field with instance name preloaderTxt that i am trying to access. Well i load it with sucess and in event complete i have this code:

    preloader = new Sprite();
    preloader = Sprite(loader.content);
    preloaderHolder = new Sprite();
    stage.addChild(preloaderHolder);
    preloaderHolder.addChild(preloader);

I tryed this:

trace(preloader.getChildAt(1));
    trace(preloader.getChildAt(1).name);

First trace is: [object TextField]
Second trace is: preloaderTxt

But when i try to set its text property like this:

preloader.getChildAt(1).text = "test"

i get this error: 1119: Access of possibly undefined property text through a reference with static type

flash.display:DisplayObject.

What am i doing wrong?

Tnx
Luka