position problems :(

[sythslwheapi22]

.div1 {
background-color:transparent; color:white;
border:none; border-color:none; 
width:460px; height:350px; overflow:auto;
position:absolute; z-index:2; left:50%; top:0%;
margin-left:50px; margin-top:320px; text-align:center;
visibility:none; filter: progid:DXImageTransform.Microsoft.Alpha(opacity=50);} 

Here's my problem:
My DIV stays where it is, but I want it to be fixed.
Whenever I write position:fixed; , it goes to the bottom of the page

[sythslwheapi22]

And I lied, it's HTML code.