TextField >> no mouse hand dont appear

programming flash
1

hi,
I have made class that extends Sprite. In sprite I make 2 Text Fields with the following properties:
[AS]
//title
var titleFormat:TextFormat = new TextFormat();
titleFormat.align = TextFormatAlign.LEFT;
titleFormat.color = 0x0075BF;
titleFormat.font = “Myriad Pro”;
titleFormat.size = 12;

        _title_txt = new TextField();
        _title_txt.x = 2;
        _title_txt.y = 4;
        _title_txt.embedFonts = true;
        _title_txt.selectable = false;
        _title_txt.width = WIDTH - 4;
        _title_txt.defaultTextFormat = titleFormat;
        _title_txt.cacheAsBitmap = true;
        addChild(_title_txt);
        
        //description
        var descriptionFormat:TextFormat = new TextFormat();
        descriptionFormat.align = TextFormatAlign.LEFT;
        descriptionFormat.color = 0x040404;
        descriptionFormat.font = "Myriad Pro";
        descriptionFormat.size = 11;
        
        _description_txt = new TextField();
        _description_txt.x = 2;
        _description_txt.y = 17;
        _description_txt.embedFonts = true;
        _description_txt.selectable = false;
        _description_txt.width = WIDTH - 4;
        _description_txt.height = HEIGHT - 20;
        _description_txt.multiline = true;
        _description_txt.wordWrap = true;
        _description_txt.defaultTextFormat = descriptionFormat;
        _title_txt.cacheAsBitmap = true;
        addChild(_description_txt);

[/AS]

I add to class addEventListener(MouseEvent.ROLL_OVER, sadasda), but when I roll over text mouse hand disappear and when I roll on background it appear again. I want to make when is on text also to stay a mouseHand. Any clues ?