ActionScript 3.0 :: Flash Button Link - Fade In Logo

I have a flash button link using actionscript 3.0. The animation is a fade in of a logo. The problem is that the button is only a link during the animation, ie. when the logo has fully faded in it stops becoming a link.

Here is the actionscript code I am using:
import flash.events.MouseEvent;myButton.addEventListener(
MouseEvent.CLICK, myButtonFunction);
function myButtonFunction(event:MouseEvent):void {var request:URLRequest = new URLRequest("[URL]");
navigateToURL(request, "_self");}