htmlText Linked Image

programming flash
1

Hi all!
I’m trying to figure out why the image link doesn’t work
But the Text Link seems to work.

i mean the image link does work only if i click on the image border.
i can see the hand cursor , click the image and go to the link only if i move my mouse about 5px around image.
So its 5px around all image where i can click the link((
but there is nothing when i move my mouse on the image and click it:

var _HTML="<a href='http://url'><img width='650' height='350' id='img1' src='image.jpg'></a> SOME TEXT and <a href='http://url'>Text Link</a>";

  _tf = new TextField();
  addChild(_tf);
  _tf.x=0;
  _tf.y=400;
  _tf.defaultTextFormat = _fmt;
  _tf.autoSize = TextFieldAutoSize.LEFT;
  _tf.width = 670;
  _tf.multiline =true;
  _tf.wordWrap = true;
  _tf.htmlText=_HTML;

  _tf.addEventListener(TextEvent.LINK,clickin);
 
function clickin(t:TextEvent):void
        {
            var request:URLRequest=new URLRequest(t.text);
            navigateToURL(request);
        }

Could you help me out?