FAIL (the browser should render some flash content, not th..

I took over a site recently that is suddenly having Flash problems in
Firefox 3. I know nothing about Flash. Could someone take a look at it and
tell me if it is possible to fix it, or do I have to scrap the Flash and
come up with a new logo/menu alternative?

Site is here:

http://www.keepsmilingplumbing.com

Embed code is this:

<td valign="top" width="766" height="239"
style="background:URL(images/header.jpg); background-repeat:no-repeat
"><object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0"
width="766" height="239">
<param name="movie" value="flash\header.swf">
<param name="quality" value="high">
<param name="menu" value="false">
<!--[if !IE]> <-->
<object data="flash\header.swf"
width="766" height="262" type="application/x-shockwave-flash">
<param name="quality" value="high">
<param name="menu" value="false">
<param name="pluginurl"
value="http://www.macromedia.com/go/getflashplayer">
FAIL (the browser should render some flash content, not this).
</object>
<!--> <![endif]-->
</object>

Thanks.