no logro que las subcategorias se vean en IE7

[easy]

Ayuda Porfa

tengo este menu en css y no se ve en IE7,no se que hacer, ayuda porfa

Código:

/*here goes the top tabs menu ad submenus */
#toptabs {
float: right;
text-align:left;
margin:0;
}
/* Root = Horizontal, Secondary = Vertical */
ul#menu {
  margin: 0;
  border: 0 none;
  width:800px;
  list-style: none;
  height: 20px;
  padding-top:10px;
  padding-bottom:5px;
}

ul#menu li {
  margin: 0;
  padding-right:22px;
  border: 0 none;
  float: right; /*For Gecko*/
  display: inline;
  list-style: none;
  position: relative;
  height: 20px;
}
ul#menu li{
	padding-bottom:5px;
}
ul#menu li:hover{
}

ul#menu  ul {
  margin: 0;
  border: 0 none;
  padding: 0;
  width: 210px;
  list-style: none;
  display: none;
  position: absolute;
  top: 25px;
  left: 5px;
  background:#222;
  border: none;
  opacity: 0.8;
  -moz-opacity: 0.8;
  filter:alpha(opacity=80);
}

ul#menu ul:after /*From IE 7 lack of compliance*/{
  clear: both;
  display: block;
  font: 1px/0px serif;
  content: ".";
  height: 0;
  visibility: hidden;
}

ul#menu ul li {
  width: 210px;
  float: left; /*For IE 7 lack of compliance*/
  display: block !important;
  display: inline; /*For IE*/
}

/* Root Menu */
ul#menu a {
  padding: 5px 15px 5px;
  float: none !important; /*For Opera*/
  float: left; /*For IE*/
  display: block;
  color:#ff8a00;
  text-decoration: none;
  font-family:Tahoma;
  font-size:12px;
  font-weight:normal;
/*  border-right:1px solid #818181;*/
  text-decoration: none;
  height: auto !important;
  height: 1%; /*For IE*/
}

/* Root Menu Hover Persistence */
ul#menu a:hover,
ul#menu li:hover a,
ul#menu li.iehover a {
color:#fff;

}

/* 2nd Menu */
ul#menu li:hover li a,
ul#menu li.iehover li a {
  float: none;
  border:none;
}

/* 2nd Menu Hover Persistence */
ul#menu li:hover li a:hover,
ul#menu li:hover li:hover a,
ul#menu li.iehover li a:hover,
ul#menu li.iehover li.iehover a {
  background:#666;
  color:#ff8a00;
}

/* 3rd Menu */
ul#menu li:hover li:hover li a,
ul#menu li.iehover li.iehover li a {
  background:#333;
  color:#fff;
}

/* 3rd Menu Hover Persistence */

ul#menu li:hover li:hover li a:hover,
ul#menu li:hover li:hover li:hover a,
ul#menu li.iehover li.iehover li a:hover,
ul#menu li.iehover li.iehover li.iehover a {
  background: #666;
  color:#ff8a00;
}

/* 4th Menu */
ul#menu li:hover li:hover li:hover li a,
ul#menu li.iehover li.iehover li.iehover li a {
  background: #333;
  color:#fff;
}

/* 4th Menu Hover */
ul#menu li:hover li:hover li:hover li a:hover,
ul#menu li.iehover li.iehover li.iehover li a:hover {
  background: #666;
  color:#ff8a00;
}

ul#menu ul ul,
ul#menu ul ul ul {
  display: none;
  position: absolute;
  top: 0;
  left: 210px;
}

/* Do Not Move - Must Come Before display:block for Gecko */
ul#menu li:hover ul ul,
ul#menu li:hover ul ul ul,
ul#menu li.iehover ul ul,
ul#menu li.iehover ul ul ul,
ul#menu li.iehover ul ul ul ul {
  display: none;
}

ul#menu li:hover ul,
ul#menu ul li:hover ul,
ul#menu ul ul li:hover ul,
ul#menu li.iehover ul,
ul#menu ul li.iehover ul,
ul#menu ul ul li.iehover ul {
  display: block;
}
ul#menu .selected {
cursor:default;
color:#fff;
}