header swf mi modifica i menu

[ilenia]

Ho modificato l'immagine jpg con un header swf come ho letto su questo forum.
l'swf si visualizza, ma si allarga la barra dei menu (con firefox). con explorer scompare la barra dei menù.

www.windsurfvallugola.com

INDEX.PHP:

<div class="Header">
    <!--div class="Header-png"></div>
    <div class="Header-jpeg"></div>-->
   <!--  CODICE per inserire un flash che si deve chiamare header.swf. modificare le dimensioni-->
   <OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
      codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0" WIDTH="842" HEIGHT="226" id="logo" ALIGN="">
      <PARAM NAME=movie VALUE="<?php echo "$GLOBALS[mosConfig_live_site]/templates/$GLOBALS[cur_template]/"; ?>header12.swf">
      <PARAM NAME="quality" VALUE="high">
      <PARAM NAME="bgcolor" VALUE="#363B53">
      <EMBED
         src="<?php echo "$GLOBALS[mosConfig_live_site]/templates/$GLOBALS[cur_template]/"; ?>header12.swf"
         quality="high"
         bgcolor="#363B53"
         WIDTH="842" HEIGHT="226"
         NAME="logo"
         ALIGN=""
         TYPE="application/x-shockwave-flash"
         PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer">
      </EMBED>
      </div>
   </OBJECT>
</div>   

---------------------------------------
TEMPLATE.CSS :

/* begin Header */
div.Header
{
   margin: 0 auto;
   position: relative;
   z-index:0;
   width: 866px;
   height: 250px;
}

'div.Header-png
'{
'   position: absolute;
'   z-index:-2;
'   top: 0;
'   left: 0;
'   width: 866px;
'   height: 250px;
'   background-image: url('../images/Header.png');
'   background-repeat: no-repeat;
'   background-position: left top;
'}
'
'div.Header-jpeg
'{
'   position: absolute;
'   z-index:-1;
'   top: 0;
'   left: 0;
'   width: 866px;
'   height: 250px;
'   background-image: url('../images/Header.jpg');
'   background-repeat: no-repeat;
'   background-position: center center;
'   
'}
/* end Header */

----------------------------------------------

Sinceramente non riesco a capire, ci sto perdendo il cervello.

please Carneade.
GRAZIE