MyddyDogPaws dropdown manu CSS problem.. ANYBODY >>HELP ?!?

Hi

I want to create drop menu like

http://www.muddydogpaws.com/development/wayfinder/examples/example-1.html

but when I follow the manual everything is working in FF but in IE the menu don’t want to "drop"

I copy the css also so if anybody can help me?

dropdown.css is :
"......
/* common styling */
.menu {font-family: arial, sans-serif; width:750px; position:relative; margin:0; font-size:11px; margin:2px 0 100px 0; z-index:100;}
.menu ul li a, .menu ul li a:visited {display:block; text-decoration:none;
color:#000;width:104px; height:20px; text-align:center; color:#fff;
border:1px solid #fff; background:#710069; line-height:20px; font-size:11px; overflow:hidden;}
.menu ul {padding:0; margin:0;list-style-type: none; }
.menu ul li {float:left; margin-right:1px; position:relative;}
.menu ul li ul {display: none;}

/* specific to non IE browsers */
.menu ul li:hover a {color:#fff; background:#36f;}
.menu ul li:hover ul {display:block; position:absolute; top:21px; left:0; width:105px;}
.menu ul li:hover ul li a.hide {background:#6a3; color:#fff;}
.menu ul li:hover ul li:hover a.hide {background:#6fc; color:#000;}
.menu ul li:hover ul li ul {display: none;}
.menu ul li:hover ul li a {display:block; background:#ddd; color:#000;}
.menu ul li:hover ul li a:hover {background:#6fc; color:#000;}
.menu ul li:hover ul li:hover ul {display:block; position:absolute; left:105px; top:0;}
.menu ul li:hover ul li:hover ul.left {left:-105px;}....."

AND the
dropdown_ie.css is
".....
.menu ul li a.hide, .menu ul li a:visited.hide {display:none;}
.menu ul li a:hover ul li a.hide {display:none;}

.menu ul li a:hover {color:#fff; background:#36f;}
.menu ul li a:hover ul {display:block; position:absolute; top:21px; left:0; width:105px;}
.menu ul li a:hover ul li a.sub {background:#6a3; color:#fff;}
.menu ul li a:hover ul li a {display:block; background:#ddd; color:#000;}
.menu ul li a:hover ul li a ul {visibility:hidden;}
.menu ul li a:hover ul li a:hover {background:#6fc; color:#000;}
.menu ul li a:hover ul li a:hover ul {visibility:visible; position:absolute; left:105px; top:0; color:#000;}
.menu ul li a:hover ul li a:hover ul.left {left:-105px;}...."


thnks