div id´s i php

Hey

jeg har denne her side

www.loekkenbrand.dk/test/Untitled-1.htm

hvorfor går der der ged i min news div kan ikke få den til opføre sig som min udryk div. men når jeg loader den i IE, og som i ser, ser den rigtig nok ud

CSS kode:
@charset "utf-8";
body  {
    font: 100% Verdana, Arial, Helvetica, sans-serif;
    margin: 0; /* it's good practice to zero the margin and padding of the body element to account for differing browser defaults */
    padding: 0;
    text-align: justify; /* this centers the container in IE 5* browsers. The text is then set to the left aligned default in the #container selector */
    color: #000000;
    background-image: url(gfx/15690-baggrund.gif);
}
.twoColFixLtHdr #container {
    width: 780px;
    margin: 0 auto;
    text-align: left; /* this overrides the text-align: center on the body element. */
    background-color: #FFFFFF;
}
.twoColFixLtHdr #menu {
    height: 24px;
}
.twoColFixLtHdr #flash {
    width: 600px;
    height: 224px;
}
.twoColFixLtHdr  #spacertop {
    height: 10px;
    background-image: url(gfx/15690-baggrund.gif);
}
.twoColFixLtHdr #spaceline {
    height: 10px;
    background-image: url(gfx/15690-baggrund.gif);
}

.twoColFixLtHdr #header {
    height: 85px;
    background-image: url(gfx/topbaner.jpg);

}
.twoColFixLtHdr  #login {
    float: left; /* since this element is floated, a width must be given */
    width: 143px; /* the background color will be displayed for the length of the content in the column, but no further */
    padding: 0px 5px 5px 5px;
    margin: 10px 0 10px 5px;
    background-color: #F3F3F3;
    height: 236px;
}
.twoColFixLtHdr #news {
    float: right;
    margin: 230px -169px 0 0;
    width: 169px;
}



.twoColFixLtHdr  #Content {
    margin: 10px 0 0 165px; /* remember that padding is the space inside the div box and margin is the space outside the div box */
    width: 435px;
}
.twoColFixLtHdr #udryk {
    float: right;
    width: 169px;
    height: 210px;
    margin: 10px 5px 10px 0;
    background-color: #F3F3F3;
}

.twoColFixLtHdr #footer {
    text-align: center;
    height: 20px;
}
.twoColFixLtHdr #footer p {
    margin: 0; /* zeroing the margins of the first element in the footer will avoid the possibility of margin collapse - a space between divs */
    padding: 10px 0; /* padding on this element will create space, just as the the margin would have, without the margin collapse issue */
}
.fltrt { /* this class can be used to float an element right in your page. The floated element must precede the element it should be next to on the page. */
    float: right;
    margin-left: 8px;
}
.fltlft { /* this class can be used to float an element left in your page */
    float: left;
    margin-right: 8px;
}
.clearfloat { /* this class should be placed on a div or break element and should be the final element before the close of a container that should fully contain a float */
    clear:both;
    height:0;
    font-size: 1px;
    line-height: 0px;
}