Code:
var styles:TextField.StyleSheet = new TextField.StyleSheet();
styles.setStyle("title", {
    color:'#C9C9C9',
    display:'inline'
});
styles.setStyle("date", {
    color:'#C9C9C9',
    display:'block'
});
styles.setStyle("message", {
    color:'#8A8A8A',
    display:'block'
});
styles.setStyle("a:link", {
    color:'#242424'
});
styles.setStyle("a:hover", {
    textDecoration:'underline'
});

var my_xml:XML = new XML();
my_xml.ignoreWhite = true;
my_xml.onLoad = function(success:Boolean):Void {
    if (success) {
        news_txt.styleSheet = styles;
		news_txt.autoSize = true;
        //news_txt.text = my_xml;
		var newsBits:Number = my_xml.firstChild.childNodes.length;
		var node = my_xml.firstChild.childNodes;
		for (var i = 0; i<newsBits; i++) {
			//news_txt.htmlText += node[i].childNodes[0] + " > " + node[i].childNodes[1];
			news_txt.htmlText += node[i].childNodes[0] + " > ";
			news_txt.htmlText += node[i].childNodes[1] + newline;
			news_txt.htmlText += node[i].childNodes[2];
			news_txt.htmlText += "---" + newline;
		}
    } else {
        trace("Error loading XML.");
    }
};

my_xml.load("newsxml.xml");
got it !