Loading Extrenal text into the custom scrollbar made in Kirupa's tutorial

Well, that title was a mouthful…
Anyways, I’ve tried five different tutorials for laoding external text now, and none of them work with the custom scrollbar.

What i currently have is a dynamic textbox in the content movieclip in the scrollbar.
the code for the frame is:

myData = new LoadVars();
myData.onLoad = function() {
myText.text = this.content;

And yes, the textbox has a instance name, and a variable name.
Does anyone know what I’m donig wrong?