Posso chiederti un'altro aiuto?

Perchè il DIV content ed il div DX non si allungano se il testo supera la lunghezza della pagina?

<body>
<div id="container">
<div id="content">
<div id="flash">
</div>
<div id="sx">
</div>
<div id="dx">
</div>
<div id="footer"></div>
</div>
</div>
</body>

CSS:

body {
font-size:72%;
font-family:Arial, Helvetica, sans-serif;
color:#666666;
margin-left: 0px;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
background-color:#FFFFFF;
background-image: url(../images/px_bg.jpg);
background-repeat:repeat-x;
}

body,html { height:100%;margin:0 }

#container {
width:780px; height:100%;
position:absolute;top:00%;left:50%;
margin: 0 0 0 -380px;
background-image:url(../images/px_top_bg.jpg);
background-position:top centre;
background-repeat:no-repeat;
background-color:transparent;
}

#content{ width:750px;
height:100%;
position:absolute;top:00%;left:50%;
margin: 0 0 0 -375px;
background-color:#F7F6EF;
background-image: url(../images/px_content_bg.jpg);
background-repeat:repeat-y;
background-position:center top;
}

#flash{ width:750px;
height:168px;
background-image:url(../images/px_flash_bg.jpg);
background-position:top left;
background-repeat:repeat-x;
}

#sx{width:204px;
background-color:#F7F6EF;
border-top:1px solid #F9F8F2;
border-bottom:1px solid #E7E6DC;
border-right:1px solid #E7E6DC;
position:absolute;
left:0;
top:168;
}
#cantieri{position:absolute;
right:0;
top:168;
width:545px;
height:24px;
background-color:#E9E8E1;
border-bottom:1px solid #E8E7DE;}

#dx{position:absolute;
right:0;
top: 193px;
width:475px;
margin:5px 35px 5px 35px;
border-left:1px solid #F9F8F2;
border-top:1 px solid #F9F8F2;
text-align:justify;
}

#footer{ width:750px;
height:36px;
position:absolute;
bottom:0;
left:0;
right:0;
background-image:url(../images/px_footer_bg.jpg);
background-repeat:no-repeat;
background-position:bottom center;}