CSS works in FF but not in IE6

I am new to style sheets, and I have been trying to get an entry level position with a web developer here close to me. They sent me a PSD and told me to layout using nothing but CSS and no tables. So I did so... and it looks fantastic in Firefox, but not at all good in IE. The only real problem is with the positioning.. the content color and size and everything seems to be fine.... all the positioning is done in the code on the website, where you can view source... I pasted the CSS code below, but doubtful it will help much. Can anyone offer me some help? The site is here: http://www.eomnis.com/test

the style sheet is here http://www.eomnis.com/test/css.css and i pasted the style sheet code below. Thanks for any help everyone.

Aaron


<style type="text/css">
body {
background-image: url('images/main_background.jpg');
background-color:#000000;
background-repeat: no-repeat;
margin: 0px;
}
.top_text {
font-size: 14px;
font-family:Verdana, Arial, Helvetica, sans-serif;
color:#FFFF00;
font-weight:400;
}
.bold_grey{
font-size:11px;
font-family:Verdana, Arial, Helvetica, sans-serif;
color:#EEEEEE;
font-weight:300;
letter-spacing:inherit;
}
.small_text{
font-size:9px;
font-family:Verdana, Arial, Helvetica, sans-serif;
color:#EEEEEE;
font-weight:300;
letter-spacing:inherit;
}
form {
font-family:Verdana, Arial, Helvetica, sans-serif;
color:#FFFFFF;
font-size:10px;
font-weight:300;
}
.select {
font-size:9px;
height:15px;
}
.input {
font-size:9px;
height:16px;
width:160px;
}
.zip {
width: 94px;
height:16px;
font-size:9px;
}
.Footer_links{
color:#CCCCCC;
font-size:14px;
font-weight:300;
text-decoration:none;
}

</style>

So.. what's wrong with it? Apart from the alignment of the left content bit I can't really see anything glaringly out of shape.
There are many unfortunate markup choices, and this way of laying out a fixed background image means the layout isn't suitable for much more than is on it now, but the little content there is should form no immediate problem.

That is actuall the problem..there is much more content to be put on the page and if it won't show correctly with that little bit, by the time its done it will be seriously out of whack.

I need the positioning to be perfect, as the background will be crammed with information.