I'm having an unusual problem. I'm using Javascript to display alternate content when users don't have Flash installed or enabled in their browsers. I've tested my code and it works on IE7/8 and Chrome. For Firefox it doesn't seem to work when I'm using the office network. My browser goes through a proxy and I disabled that to see if maybe the proxy was caching it but I still can't see the Flash in Firefox. I tried both Firefox 3 and then upgraded to 4 to see if it works. This is the code I'm using:

Code:
<script type="text/javascript" src="[insert script here]">
</script><script type="text/javascript">        
  var flashvars = {};      
  var params = {        
    wmode: "transparent"      
  };      
  var attributes = {};  
    
  var flashvars2 = {};      
  var params2 = {        
    wmode: "transparent"      
  };      
  var attributes2 = {};
        
  swfobject.embedSWF("/images/industry-news/tab-carousel.swf?path=/images/WaterGardenNews/industry-news/carousel.xml", 
        "flashaltcon", "580", "255", "9.0.0", 
        flashvars, params, attributes);
   
</script><!--primary content, for non-Flash visitors-->
<div style="padding-bottom: 5px; padding-left: 5px; width: 580px; padding-right: 5px; padding-top: 5px" id="flashaltcon">
<div style="width: 255px; float: left; vertical-align: middle"><a href="/industry-news/2011/02/14/america-in-blooms-new-webinar-series-begins-feb-22.aspx"><img border="0" alt="" src="/images/WaterGardenNews/industry-news/StanSkinger.jpg" /></a></div>
<div style="width: 325px; float: right; vertical-align: top">
<p><span style="color: #0b3e8f; font-size: 14px; font-weight: bold">Waterlily Enthusiast Stan Skinger Dies</span><br />
Stanley Skinger, a waterlily enthusiast and volunteer propagator at Denver Botanic Gardens, died March 9. <a title="Waterlily Enthusiast Stan Skinger Dies" href="/industry-news/2011/03/14/waterlily-enthusiast-stan-stinger-dies.aspx">More </a></p>
<p><span style="color: #0b3e8f; font-size: 14px; font-weight: bold">Hazorea Aquatics Buys Fish Exporter Sundag</span><br />
Hazorea Aquatics, a breeder and exporter of koi and goldfish based in Israel, acquired Sundag, an Israeli tropical fish exporter. <a title="Hazorea Aquatics Buys Fish Exporter Sundag" href="/industry-news/2011/03/02/landscape-professionals-name-top-outdoor-features-for-2011.aspx">More </a></p>
<p><span style="color: #0b3e8f; font-size: 14px; font-weight: bold">Landscape Pros Name Top Outdoor Features for 2011</span><br />
An ASLA survey reveals what most homeowners will want from their outdoor space this year. <a title="Landscape Pros Name Top Outdoor Features for 2011" href="/industry-news/2011/03/02/landscape-professionals-name-top-outdoor-features-for-2011.aspx">More </a></p>
<div style="float: right"><a class="more" title="See all news" href="/industry-news/industry-news-topics.aspx">See all exclusives </a></div>

</div>
</div>
Do I need to do anything make the Flash display for Firefox? The most confusing thing is that outside of the office network, the flash comes up ok. It's only when I'm viewing it from the office that I'm not able to see the Flash on Firefox. And it's just this one because other Flash elements on the page renders fine on Firefox. I am using different code though for those so that might be the problem? Thanks for any feedback!