problema con menu

[molamas]

CSS

Código HTML:

.topnavigation,
#topnavigation {
	clear: both;
	height: 300px;
	background: url(images/freaklifebanner2.jpg)no-repeat top center;
}

#topmenu {
	position: relative;
}

#topmenu li.parentnode {
	position: relative;
	float: left;
}

#topmenu li.parentnode ul {
	position: absolute;
	width: 200px;
	left: -40px;
	top: 28px;
}

#topmenu li.childnode ul {
	position: absolute;
	top: 0;
	left: 200px;
	width: 200px;
	z-index: 111000;
}

#topmenu ul {
	display: none;
}

#topmenu li:hover > ul {
	display: block;
}

#topmenu ul.showSubMenu,
#topmenu ul.over {
	display: block;
}

#topmenu li.childnode {
	display: block;
	z-index: 1000;
	position: relative;
	_display: inline;
}

#topmenu li.parentnode a {
	height: 22px;
	position: relative;
	padding: 5px 6px 3px 7px;
	border-style: solid;
	border-width: 1px;
	border-color: #404040 #1A1A1A #1A1A1A #505050;
	border-bottom: solid 2px #27292a;
	font-family: arial, sans-serif;
	font-size: 16px;
	font-weight: bold;
	text-decoration: none;
	color: #fff;
	display: block; /* important! DA */
	_display: inline-block;
	text-transform: uppercase;
}

#topmenu li.parentnode:hover a, 
#topmenu li.parentnode a.selected,
#topmenu li.parentnode a:hover {
	background-color: #1d4171;
}

#topmenu li.parentnode a:active { 
	/* background-color: #55a9d8;*/
}

#topmenu li.childnode a {
	display: block;
	position: relative;
	padding: 6px 8px;
	font-family: arial, sans-serif;
	font-size: 11px;
	text-decoration: none;
	color: #fff;
	border-style: solid;
	border-width: 1px;
	border-color: #2e5282 #1A1A1A #1A1A1A #2e5282;
	background: #1d4171;
	height: auto;
	text-transform: uppercase;
	*min-height: 1px; /* need for ie7 when height= auto ... */
}

#topmenu li.childnode a:hover, 
#topmenu li.childnode a.selected { 
	background: #6d96cb;	
}

#topmenu li.childnode:hover > a {
	background: #6d96cb;
}

HTML

Código HTML:

<ul id="topmenu" style="none">
                <li class="parentnode n_home">
                    <a href="#">home</a>
                    <ul>
                        <li class="childnode">
                            <a href="#">COMMENT US</a>
                        </li>

                        <li class="childnode">
                            <a href="#">HELP US</a>
                        </li>
                    </ul>
                </li>

                <li class="parentnode">
                    <a href="#">anime-z</a>
                    <ul>
                        <li class="childnode">
                            <a href="#">online</a>
                        </li>

                        <li class="childnode">
                            <a href="#">descarga</a>
                        </li>
                    </ul>
                </li>

                <li class="parentnode">
                    <a href="#">Downloads</a>
                    <ul>
                        <li class="childnode">
                            <a href="#">PDF books</a>
                        </li>

                        <li class="childnode">
                            <a href="#">online GAMES</a>
                        </li>

                        <li class="childnode">
                            <a href="#">free-sources</a>
                        </li>
                    </ul>
                </li>

                <li class="parentnode">
                    <a href="#">guides</a>
                    <ul>
                        <li class="childnode">
                            <a href="#">Photoshop</a>
                        </li>

                        <li class="childnode">
                            <a href="#">illustrator</a>
                        </li>

                        <li class="childnode">
                            <a href="#">Macromedia Flash</a>
                        </li>
                    </ul>
                </li>

                <li class="parentnode">
                    <a href="#">about us</a>
                    <ul>
                        <li class="childnode">
                            <a href="#">1er</a>
                        </li>

                        <li class="childnode">
                            <a href="#">2do</a>
                        </li>
                    </ul>
                </li>

                <li class="parentnode">
                    <a href="#">Gallery</a>
                </li>

                <li class="parentnode">
                    <a href="#">Recomendados</a>
                    <ul>
                        <li class="childnode">
                            <a>FarmStudio</a>
                        </li>

                        <li class="childnode">
                            <a>recomendado 2</a>
                        </li>

                        <li class="childnode">
                            <a href="#">recomendado 3</a>
                        </li>

                        <li class="childnode">
                            <a href="#">recomendado 4</a>
                        </li>
                    </ul>
                </li>
            </ul> 

imagen del menu, para que se hagan una idea lo que intento hacer.