Website NOT showing menu hover in Internet Explorer ???

/* CSS Document */

body 
{
background-image:url(background_champagne.gif);
background-attachment:fixed;
}

/* ........................................ Banner ........................................ */

div.banner
{
    width:40px;
    height:100px;
}


div.banner img
{
    width:40px;
    height:50px;
}

/* ......................................... Top Menu .................................... */

#topMenu
{
    background-color:transparent;
    cursor:default;
    text-align:center;
    width:980px;
    float:right;
}

#topMenu ul
{
    list-style: none;
    font-size:medium;
    float:right;
    position:relative;
    margin-left: 130px;
    width:850px;
    padding: 0;
}

#topMenu ul li 
{
    display: inline;
    border:1px solid black;
    width:210px;
    background-color:white;
    color:#FF00FF;
    float:left;
    position: relative;
    font-size:large;
}

#topMenu ul li:hover
{
    background-color:black;
}

#topMenu a
{
    display:block;
    text-decoration:none; 
    font-size:large;
    color:blue; 
}

#topMenu a:hover
{
    color:white;
    text-transform:uppercase;
}

body {behavior: url(csshover.htc);}


/* ....................................... Left Menu .......................................... */

#leftMenu
{
    background-color:transparent;
    cursor:default;
    text-align:center;
    width:100px;
    float:left;
}

#leftMenu ul
{
    text-align:center;
    list-style:none;
    margin:0px;
    position:relative;
    padding:0px;
    width:120px;
    border:thin solid red;
}

#leftMenu ul li 
{
    display: block;
    background-color:white;
    width:120px;
    border-bottom:thin solid red;
    color:blue;
    position: relative;
    font-size:large;
    line-height:50px; 
}

#leftMenu ul li:hover
{
    color:black;
    background-color:yellow;
    text-transform:uppercase;
}

#leftMenu ul li ul 
{
    position:absolute;
    display: none;
    text-transform:none;
    left:121px;
    width:123px;
    top:0px;
}

#leftMenu a
{
    display:block;
    position:relative;
    text-decoration:none; 
    background-color:white;
    line-height:20px; 
    font-size:large;
    width:123px;
    color:green;
    text-transform:none;
}

#leftMenu a:hover
{
    color:#00FFFF;
    background-color:black;
}

#leftMenu ul li ul {display:none;}
#leftMenu ul li:hover ul {display:block;}


/* This Code is for Microsoft Internet Explorer Browser 
as it shows the effect of "li:hover" */

body { behavior: url(csshover.htc); }


/* ........................... Left Menu Link Rollover Showing Image ....................... */

#leftMenu ul li img
{
position:absolute;
top:340px;
left:20px;
}

#leftMenu ul li img {display:none;}
#leftMenu ul li:hover img {display:block;}


/* ................................... Content ................................................ */

#content
{
    background-color:white;
    width:850px; 
    border:1px solid green;
    float:right;
}

#content h2
{
font-family:"Times New Roman", Times, serif;
text-align:justify;
margin:1em;
color:#990033;
text-decoration:underline;
}

#content h3
{
font-family:Georgia, "Times New Roman", Times, serif;
text-align:left;
font-size:large;
margin-left:20px;
color:blue;
text-decoration:none;
}

#content h4
{
font-family:"Courier New", Courier, monospace;
text-align:left;
font-size:large;
color:red;
margin-left:20px;
text-decoration:none;
}

#content h5
{
font-family:"Courier New", Courier, monospace;
text-align:left;
font-size:large;
color:fuchsia;
margin-left:20px;
text-decoration:none;
}

#content h6
{
font-family:"Courier New", Courier, monospace;
text-align:left;
font-size:medium;
color:black;
margin-left:20px;
text-decoration:underline;
}

#content table
{
font-family:Verdana, Arial, Helvetica, sans-serif;
text-align:left;
font-size:medium;
color:black;
margin-left:20px;
}

#content h2+p:first-letter
{
color:red;
float:left;
font-size:xx-large;
margin: 0 3px 3px 0;
}

#content p
{
font-family:Verdana, Arial, Helvetica, sans-serif;
text-align:justify;
text-indent:3em;
margin:1em 2em;
color:black;
}

#content ul
{
font-family:Verdana, Arial, Helvetica, sans-serif;
text-align:justify;
color:black;
margin:10px 50px;
list-style-image:url(list_icon.gif);
}

#content ul li
{
margin-top:15px;
}

#content ol
{
font-family:Verdana, Arial, Helvetica, sans-serif;
text-align:justify;
color:black;
margin:1em 1em 2em 3em;
list-style-type:decimal;
}

#content ol li
{
margin-top:20px;
}

#content img.left
{
float:left;
padding:10px;
}

#content img.right
{
float:right;
padding:10px;
}

/* ................................... Bottom Menu ......................................... */


#bottomMenu
{
    border:1px solid red;
    float:left;
    background-color:black;
    color:#FFFFFF;
    text-align:center;
    font-family:"Times New Roman", Times, serif;
    font-size:large;
    width:100%; 
    height:5%; 
    margin:0px;
}