[MX04] getURL help

I've got a site I'm working on that's been giving me some trouble with the getURL method.

The basic code I'm using is

PHP Code:

---

var siteurl = "http://www.website.com/"

//then on a button inside of a mc inside of another mc:

on (press) {
    getURL(_root.siteurl+"about","_self");
} 


---

Haven't testing this in any other browsers, but in ff when the url of the html page is "http://www.website.com/" all the links work perfectly, but if the url is "http://website.com/" the links don't seem to load the page.