Navigation troubles

Hello…

I’m doing a little flash nav bar and I’m trying to have the buttons link to the correct web pages. My code is extensive and I’d rather not post the whole thing in here so I’ll try to be as concise as possible.

Basically I’m getting this error:
1137: Incorrect number of arguments. Expected no more than 1.

Everything was running smooth in my script until I added the URL requests here:

function onClick(e:MouseEvent):void
{
    switch(MovieClip(e.currentTarget).id)
    {
        case 0:
        navigateToURL(new URLRequest("http://www.xxx.com","_self"));
        break;
        case 1:
        navigateToURL(new URLRequest("http://www.xxx.com/products.html","_self"));
        break;
        case 2:
        trace("services")
        break;
        case 3:
        trace("environment")
        break;
        case 4:
        trace("msds")
        break;
        case 5:
        trace("about")
        break;
    }
}

Is the syntax incorrect or something? Again, everything was fine up until I added those two at for case 0 and case 1.

Thanks in advance.