Question : Navigation only works on certain frames

I have an fla located at http://mm214.com/home.fla
I'm using event listeners for my navigation and even though all my instances appear to be named correctly, the navigation does not work beyond the services frame. I've been working on this for 9.5 hours and cannot find cs3 documentation as to why the action script does not apply to all frames...
services.addEventListener(MouseEvent.CLICK, clickServices);
function clickServices(event:Event):void {
      gotoAndStop("services");
}
portfolio.addEventListener(MouseEvent.CLICK, clickPortfolio);
function clickPortfolio(event:Event):void {
      gotoAndStop("portfolio");

}
clients.addEventListener(MouseEvent.CLICK, clickClients);
function clickClients(event:Event):void {
      gotoAndStop(31);

}
aboutus.addEventListener(MouseEvent.CLICK, clickAboutus);
function clickAboutus(event:Event):void {
      gotoAndStop("aboutus");

}
contact.addEventListener(MouseEvent.CLICK, clickContact);
function clickContact(event:Event):void {
      gotoAndStop("contact");

}

Answer : Navigation only works on certain frames

why don't make them simpler like:
addEventListener(MouseEvent.CLICK, clickServices);
function clickServices(event:Event):void {
      if(event.target.name == "services"){
      gotoAndStop("services");
      }
      if(event.target.name == "portfolio"){
      gotoAndStop("portfolio");
      }
      if(event.target.name == "clients"){
      gotoAndStop(31);
      }
      if(event.target.name == "aboutus"){
      gotoAndStop("aboutus");
      }
      if(event.target.name == "contact"){
      gotoAndStop("contact");
      }
}