Hola a todos,
Aprovecho para presentarme en el foro y de paso felicitares por este magnifico foro.
 
 
Bien nauix26 creo que te falta un script.js que haga funcionar el menú, te dejo 3 scripts para que los estudies haber que te parecen.  
index.html 
<head>
   <script type="text/javascript" src="script.js"></script> 
    <link rel="stylesheet" href="style.css" type="text/css" media="screen" />
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Documento sin título</title>
</head> 
<body>
<div class="nav">
                    <ul class="artmenu">
                        <li><a href="#" class="{ActiveItem}"><span><span>Home</span></span></a></li>
                        <li><a href="#"><span><span>About</span></span></a>
                                        <ul>
                                <li><a href="#">Photos</a></li>
                                <li><a href="#">Press</a></li>
                            </ul>
                      </li>
                        <li><a href="#"><span><span>Services</span></span></a></li>
                        <li><a href="#"><span><span>Solutions</span></span></a>
                                        <ul>
                                <li><a href="#">Consulting</a>
                                    <ul>
                                        <li><a href="#">Lorem ipsum</a> </li>
                                        <li><a href="#">Dolor sit amet</a> </li>
                                        <li><a href="#">Consectetuer</a> </li>
                                    </ul>
                                </li>
                                <li><a href="#">Training</a></li>
                                <li><a href="#">Analisys</a></li>
                            </ul>
                      </li>
                        <li><a href="#"><span><span>Contact</span></span></a></li>
                    </ul>
                    <div class="l">
                    </div>
                    <div class="r">
                        <div>
                        </div>
                    </div>
                </div>
</body>
</html>         
script.js 
/* begin Menu */
function Insert_Separators()
{
  var menus = xGetElementsByClassName("artmenu", document);
  for (var i = 0; i < menus.length; i++) {
    var menu = menus[i];
    var childs = menu.childNodes;
    var listItems = [];
    for (var j = 0; j < childs.length; j++){
      var el = childs[j];
      if (String(el.tagName).toLowerCase() == "li")listItems.push(el);
    }
    for (var j = 0; j < listItems.length - 1; j++){
      var span = document.createElement('span');
      span.className = 'separator';
      var li = document.createElement('li');
      li.appendChild(span);
      listItems[j].parentNode.insertBefore(li, listItems[j].nextSibling);
    }
  }
}
artLoadEvent.add(Insert_Separators); 
/* end Menu */       
style.css 
/* begin Page */  
body
{
  margin: 0 auto;
  padding: 0;
  background-color: #39413D;
  background-image: url('images/Page-BgTexture.jpg');
  background-repeat: repeat-x;
  background-attachment: fixed;
  background-position: bottom left;
} 
.Main
{
  position: absolute;
  width: 100%;
  left: 0;
  top: 0;
}     
.cleared
{
  float: none;
  clear: both;
  margin: 0;
  padding: 0;
  border: none;
  font-size:1px;
} 
.artmenu a, .artmenu a:link, .artmenu a:visited, .artmenu a:hover
{
  text-align:left;
  text-decoration:none;
  outline:none;
  letter-spacing:normal;
  word-spacing:normal;
} 
.artmenu, .artmenu ul
{
  margin: 0;
  padding: 0;
  border: 0;
  list-style-type: none;
  display: block;
} 
.artmenu li
{
  margin: 0;
  padding: 0;
  border: 0;
  display: block;
  float: left;
  position: relative;
  z-index: 5;
  background:none;
} 
.artmenu li:hover
{
  z-index: 10000;
  white-space: normal;
} 
.artmenu li li
{
  float: none;
} 
.artmenu ul
{
  visibility: hidden;
  position: absolute;
  z-index: 10;
  left: 0;
  top: 0;
  background:none;
} 
.artmenu li:hover>ul
{
  visibility: visible;
  top: 100%;
} 
.artmenu li li:hover>ul
{
  top: 0;
  left: 100%;
} 
.artmenu:after, .artmenu ul:after
{
  content: ".";
  height: 0;
  display: block;
  visibility: hidden;
  overflow: hidden;
  clear: both;
}
.artmenu, .artmenu ul
{
  min-height: 0;
} 
.artmenu ul
{
  background-image: url(images/spacer.gif);
  padding: 10px 30px 30px 30px;
  margin: -10px 0 0 -30px;
} 
.artmenu ul ul
{
  padding: 30px 30px 30px 10px;
  margin: -30px 0 0 -10px;
}  
/* menu structure */ 
.nav
{
  position: relative;
  margin: 0  auto;
  width: 1000px;
  height: 25px;
  z-index: 100;
} 
.artmenu
{
  padding: 0px 0px 0px 0px;
}  
.nav .l, .nav .r, .nav .r div
{
  top: 0;
  position: absolute;
  z-index: -1;
  overflow: hidden;
  height: 25px;
} 
.nav .l
{
  left: 0;
  right: 0px;
}  
.nav .r
{
  right: 0;
  width: 0px;
}  
.nav .r div
{
  width: 1000px;
  right: 0;
}  
.nav .l, .nav .r div
{
  background-position: left top;
  background-repeat: no-repeat;
  background-image: url('images/nav.png');
} 
/* end Menu */ 
/* begin MenuItem */
.artmenu ul li
{
  clear: both;
} 
.artmenu a , .artmenu a span
{
  height: 25px;
  display: block;
}  
.artmenu a
{
  cursor: pointer;
  text-decoration: none;
  margin-right: 0px;
  margin-left: 0px; 
}
.artmenu a span span
{
  font-family: Arial, Helvetica, Sans-Serif;
  font-size: 12px;
  font-style: normal;
  font-weight: normal;
  color: #FE9D5D;
  padding: 0 22px;
  margin: 0 0px;
  line-height: 25px;
  text-align: center;
  background-image: url('images/item-center.png');
  background-position: left top;
  background-repeat: repeat-x; 
}    
.artmenu a:hover span span
{
  color: #EFF1F0;
  background-position: left -25px;
} 
.artmenu li:hover a span span
{
  color: #EFF1F0;
  background-position: left -25px;
}  
/* end MenuItem */ 
/* begin MenuSeparator */
.nav .separator
{
  display: block;
  width: 1px;
  height: 25px;
  background-image: url('images/item-separator.png');
} 
/* end MenuSeparator */ 
/* begin MenuSubItem */
.artmenu ul a
{
  display:block;
  text-align: center;
  white-space: nowrap;
  height: 21px;
  width: 176px;
  overflow:hidden;
  line-height: 21px;
  margin-right: auto;  
  background-image: url('images/subitem-bg.png');
  background-position: left top;
  background-repeat: repeat-x; 
  border-width: 1px;
  border-style: solid;
  border-color: #FE6601;
} 
.nav ul.artmenu ul span, .nav ul.artmenu ul span span
{
  display: inline;
  float: none;
  margin: inherit;
  padding: inherit;
  background-image: none;
  text-align: inherit;
  text-decoration: inherit;
} 
.artmenu ul a, .artmenu ul a:link, .artmenu ul a:visited, .artmenu ul a:hover, .artmenu ul a:active, .nav ul.artmenu ul span, .nav ul.artmenu ul span span
{
  text-align: left;
  text-indent: 12px;
  text-decoration: none;
  line-height: 21px;
  color: #000000;
  font-family: Arial, Helvetica, Sans-Serif;
  font-size: 12px;
  font-style: normal;
  font-weight: normal;
} 
.artmenu ul ul a
{
  margin-left: auto;
} 
.artmenu ul li a:hover
{
  color: #E9ECEB;
  border-color: #FE8534;
  background-position: 0 -21px;
} 
.artmenu ul li:hover>a
{
  color: #E9ECEB;
  border-color: #FE8534;
  background-position: 0 -21px;
} 
.nav .artmenu ul li a:hover span, .nav .artmenu ul li a:hover span span
{
  color: #E9ECEB;
} 
.nav .artmenu ul li:hover>a span, .nav .artmenu ul li:hover>a span span
{
  color: #E9ECEB;
}  
/* end MenuSubItem */  
Copialos en el mismo directorio y prueba.
salu2