problema allineamento div explorer 6

[pettedemon]

Ciao a tutti!
Io sto realizzando questa struttura per l'header di un sito



In allegato lo schema

     <script type="text/javascript">
 <!--
 function RadioCompanyStreaming() {
   var w = 230;
   var h = 350;
   var l = Math.floor((screen.width-w)/2);
   var t = Math.floor((screen.height-h)/2);
      window.open("pop/pop.php","","width=" + w + ",height=" + h + ",top=" + t + ",left=" + l);
 }
 //-->
</script> 

<!--[if IE]>
<style type="text/css"> 
#stream_pulsante, #testata, #sin, prima_fascia { zoom: 1;}
</style>
<![endif]-->
 
 
 
  <div id="testata" style="float:left; width:960px; height:190px; margin-top:20px; ">
  
 
  <div id="prima_fascia" style="float:left; width:960px; height:90px; margin-bottom:10px; ">
  
    
   <div id="sin" style="float:left; width:222px; height:90px;  ">
  
     
   <div id="logo_trasparente" style="float:left; width:222px; height:70px; ">[url="home.php"][img]images/logo_radio.png[/img][/url]</div>
   
   
   
   <div id="stream_pulsante" style="float:left; width:222px; height:20px; display:inline;text-align: left;
display: inline; ">[url="javascript:pop()"][img]images/stream_over.png[/img][/url]</div>
   
  
   </div> 
   
  
    
  <div id="bannerone" style="float:left; width:728px; height:90px; margin-left:10px; word-wrap: break-word;"><?php include("banner_top.html"); ?></div>
  
  
  
  
     </div> 
     
    
    
<div id="seconda_fascia" style="float:left; width:960px; height:90px; margin-bottom:10px; ">
    
    
    <div id="a_sinistra" style="float:left; width:830px; height:90px; ">
    
    
     <div id="menu_radio" style="float:left; width:830px; height:30px; "><?php include("menub.html"); ?></div>
    
    
    
      <div id="titolo_blog" style="float:left; width:830px; height:50px; margin-top:10px; ">[img]images/tit.png[/img]</div>
    
    
    
    
    </div>
    
    
        
    <div id="a_destra" style="float:left; margin-left:10px; width:120px; height:90px; "></div>
    
    
    
    
    </div>
       
 
    
</div>

Non riesco a venirne fuori in explorer 6!

Avete qualche suggerimento ?

Grazie