Try to do as Garry Wong said. But if you must use the ENTER_FRAME
for some reasons , so use it only once , like this:
addEventListener(Event.ENTER_FRAME, fl_EnterFrameHandler);
function fl_EnterFrameHandler(event:Event):void
{
removeEventListener(Event.ENTER_FRAME, fl_EnterFrameHandler);
navigateToURL(new URLRequest("http://www.levittproperties.com/sitebuildercontent/sitebuilderfiles/homepage.swf"), "_self");
}