Actionscript 3 and _self

Hi Guys,

I'm trying to get a page to load in the same tab, instead of creating a new tab (like HTML target=""_self" instead of _blank)

I've tried a few different things I've found on different forums, nothign seems to be working though

This is what I'm trying..

function gotoManitoba(event:MouseEvent):void

{

var targetURL:URLRequest = new URLRequest("http://mydomain.com/flash/?p=44");

navigateToURL(targetURL, "_self");

}

MB.addEventListener(MouseEvent.CLICK, gotoManitoba);

It doesn't return an error, but the link doesn't work at all as long as the "_self" is in there.