Menu not working in IE6

#nav, #nav ul {padding: 0;margin: 0 auto;list-style: none}
	#nav {align: center; width: 760px; background: #999 url("images/button_dn.gif") repeat-x;font-weight:bold;height:2.09em;font: bold 96% arial;margin: 0 0px 0 0px}
	#nav li {position:relative;background: #999 url("images/button_dn.gif") repeat-x;float: left;width: auto;display:block;margin: 0;border-bottom: 1px solid #DDDDDD;border-right: 1px solid #DDDDDD;padding:0}
	#nav a, #nav a:link, #nav a:visited, #nav a:hover, #nav a:active {border-bottom: none;text-decoration:none;cursor:pointer;color:#999;display: block;padding: 4px 10px 2px}
	#nav a:hover {background: #999 url("images/button_up.gif") repeat-x;color:#81A021}
	
	#nav li ul {border-bottom: 1px solid #999;border-left: 1px solid #999;border-right: 1px solid #999;background: #f6f6f6;
	filter:alpha(opacity=80);
	-moz-opacity:0.8;
	opacity:0.8;
	-khtml-opacity:0.8;
	width:11em;font-size:90%;margin-top:3px;position: absolute;font-weight:normal;left: -999em;}
	
	#nav li:hover ul, #nav li.sfhover ul {top:19px;left: 0;z-index:99999}
	#nav li li {background:none;float:none;border:none;border: 1px solid #999;border-top:1px solid #fff;border-right:none;border-left:none;padding-left:0}
	#nav li li.last {border-bottom:none}
	#nav li li a, #nav li li a:link, #nav li li a:visited, #nav li li a:hover {
	color:#000;
	border-bottom: none;
	 padding: 3px 10px 2px;
	 }
	#nav li li a:hover {color:#000;background:#EFEFEF url("images/button_up.gif") repeat-x;}
	
	#nav li.active {color:#000;background:#EFEFEF url("images/button_up.gif") repeat-x}
	#nav li.active ul {color:#000;background:#EFEFEF url("images/button_up.gif") repeat-x}
	#nav li.active a:link, #nav li.active a:visited, #nav li.active a:hover, #nav li.active a:active {color:#000;background:#EFEFEF url("images/button_up.gif") repeat-x}
	#nav li.active a:hover {color:#000;background:#EFEFEF url("images/button_up.gif") repeat-x}
	#nav li.here {color:#81A021;background:#F3F9E1 url("images/bgcloser.jpg") repeat-x; height:18px; border-bottom: none;
	 padding: 4px 10px 2px;
	 width:auto}
	 #nav li.here a{color:#81A021;background:transparent; border-bottom: none; margin:0;
	  padding:0px;}
	#nav li li.here {color:#000;
	background: #D2DEB0;
	
	 
	 }
	
	#nav li.active li {border:none;border-top: 1px solid #EFEFEF}
	#nav li.active li.last {border-bottom: none;}
	#nav li.active li a:link, #nav li.active li a:visited, #nav li.active li a:hover, #nav li.active li a:active {color:#000;background:#EFEFEF url("images/button_up.gif") repeat-x}
	#nav li.active li a:hover {color:#000;background:#EFEFEF url("images/button_up.gif") repeat-x}
	
	#nav li.active li.active a:link, #nav li.active li.active a:visited, #nav li.active li.active a:hover, #nav li.active li.active a:active {color:#000;background:#EFEFEF url("images/button_up.gif") repeat-x}

	/* hide from IE mac */
	#nav li {width:auto}
	/* end hack */