MOTION_CHANGE Event help

Hi, the below is tweening OK as expected but the doBlur function is not being called.

Does anybody know why? It's driving me nuts!

Cheers

//////////////////////////////////////////////////////////////////////////////////////////////////////

function doBlur(e:TweenEvent):void
{
      rectangle.filters = [blur];
      trace("BLUR");
}

//////////////////////////////////////////////////////////////////////////////////////////////////////

function slideRect(e:TimerEvent):void
{
      hideSelected();
      trace(rectangle.x);
      trace(slideAmount);
      
      if (rectangle.x == -3840)
      {
            trace("LAST SLIDE");
            var myTween:Tween = new Tween(rectangle,"x",Strong.easeOut,rectangle.x,rectangle.x + 3840,.5,true);
            slideTimer.reset();
            slideTimer.start();
            rectangle.addEventListener(TweenEvent.MOTION_CHANGE, doBlur);
      }
      else
      {
            var myTween2:Tween = new Tween(rectangle,"x",Strong.easeOut,rectangle.x,rectangle.x - 960,.5,true);
            blocker.block1.visible = true;
            rectangle.addEventListener(TweenEvent.MOTION_CHANGE, doBlur);
      }
}