Professional :: Dynamic Text - Change Font Properties?

I am loading a small scrolling text box dynamically from a .txt doc in the same folder, but I can't find anything about changing the font properties. No matter what changes I make to the code, the font stays size 12, times new roman, black. I want to change all three of these properties, but most of the related forum posts I have found are about changing the font for a given sentence, manually input into the AS. I need flash to list all font in the text file as Arial, 13, and white in color.This is being set up so members of managment can update news without needing flash to do so, so they obviously can't type everything into the AS.

Here is the code I'm using:
var myTextLoader:URLLoader = new URLLoader();
var myTextField_txt:TextField = new TextField();
myTextField_txt.wordWrap=true;
myTextField_txt.width=200;
var style:TextFormat = new TextFormat();
style.size = "12";
style.color = "0xFFFFFF";
style.font = "Arial";

I have created a new font in the library with the settings required, and named it Arial, but this was still unsuccessful.
myTextLoader.addEventListener(Event.COMPLETE, onLoaded);
function onLoaded(e:Event):void {myTextField_txt.text = e.target.data;addChild(myTextField_txt);}
myTextLoader.load(new URLRequest("myText.txt"));