Problem with CSS and IE

hello. I got a problem with a small navigation menu that i make.
The menu works perfectly with Google Chrome but in IE doen't work
Above is the code from Css and Html file


The css code

.Texta12 {
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 12px;
font-weight: normal;
color: #F0F0F0;
text-decoration: underline
}
ul {
padding: 0;
margin: 0;
list-style: none;
background-color: #FFB8D8;
line-height: normal;
}
li {
float: left;
position: relative;
width: 14em;
line-height: normal;
}
li ul {
display: none;
position: absolute;
top: 1em;
left: 0;
line-height: normal;
height: auto;
}

li > ul {
top: auto;
left: auto;
}
li:hover ul {
display: block;
width: 100%;
}

a.norm { background-color: #B60345 ; color: #F0F0F0; }
.over { background-color: #D0F0FF }
a.style2 {
color: #000000;
font-family: Verdana;
font-size: 12px;
font-style: normal;
font-weight: bolder;
}
a.norm2 { color: #F0F0F0; }
.over { background-color: #D0F0FF }
a.style22 {
color: #000000;
font-family: Verdana;
font-size: 12px;
font-style: normal;
font-weight: bolder;
background-color: #B60345;
}
span.norm { background-color: #B60345 ; color: #000000; }
.over { background-color: #D0F0FF }
span.style2 {
color: #000000;
font-family: Verdana;
font-size: 14px;
font-style: normal;
font-weight: bolder;
}

.test {
color: #000000;
}
.style6 {font-weight: normal; color: #000000; text-decoration: none; font-family: Verdana, Arial, Helvetica, sans-serif;}

The html code
<ul><ul><li><span class="Texta12"><a href="www.google.com" class="Texta12" onmouseover="this.className='style2'" onMouseOut="this.className='norm'">Τμήματα και Υπηρεσίες</a>
</span>
<ul >
<li class="Texta12" ><a onMouseOut="this.className='norm2'" onmouseover="this.className='style22'" href="">Ψυχολογική Υποστήριξη</a></li>
<li class="Texta12"><a onMouseOut="this.className='norm2'" onmouseover="this.className='style22'" href="">Λογοθεραπείας</a></li>
<li class="Texta12"><a onMouseOut="this.className='norm2'" onmouseover="this.className='style22'" href="">Εργοεραπείας</a></li>
<li class="Texta12"><a onMouseOut="this.className='norm2'" onmouseover="this.className='style22'" href="">Ειδικής Αγωγής</a></li>
<li class="Texta12"><a onMouseOut="this.className='norm2'" onmouseover="this.className='style22'" href="">Φυσικοθεραπείας</a></li>
<li class="Texta12"><a onMouseOut="this.className='norm2'" onmouseover="this.className='style22'" href="">Πρώιμης παρέμβασης</a></li>
</ul>
</li>
</ul>
</ul>
I probably must change something on th css to make it IE compatible.

The fuctionality is that on hove a drop down list appears.
thank you in advance

Validate your markup (http://validator.w3.org/#validate_by_input) and fix the errors first.

I am sorry but i cannot understand what do you want me to do..

http://validator.w3.org/docs/help.html#validation_basics may help.