Why am I experiencing problems adding flash content in CS3

I've added a .swf file to my html page but when assining an CSS ID to the object to position it on the page, it shows as in place on the dreamweaver layout, but when viewing in firefox, opera or safari to flash object displays out of position in the top left corner.

help and advice is appreciated

this is the code for the object:

<script type="text/javascript">
AC_FL_RunContent( 'codebase','http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0','width','565','height','235','id','bodytxtpos1','title','flash','src','images/rollingfolio_newv2','quality','high','pluginspage','http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash','movie','images/rollingfolio_newv2' ); //end AC code
</script><noscript><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=9,0,28,0" width="565" height="235" id="bodytxtpos1" title="flash">
  <param name="movie" value="images/rollingfolio_newv2.swf" />
  <param name="quality" value="high" />
  <embed src="images/rollingfolio_newv2.swf" quality="high" pluginspage="http://www.adobe.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" width="565" height="235"></embed>
</object>
</noscript><script type="text/javascript">

This is the CSS code:

}
#bodytxtpos1 {
    position: absolute;
    left: 270px;
    top: 240px;
    width: 565px;