Trouble figuring out pathname for embedded swf loading external swfs & xml

Question

I have a swf that loads content from an XML file. This works fine when everything is in the same directory, but I want this swf to appear in several different HTML pages, which are in several different directories and I don't want to have to put 8 different copies of my swf online just so that they load properly. The directory structure is like this:
main_dir:
mod_dirmod01_dirmodcontent_dirmyembeddedswf.html
myflash_dirsub1
sub2:
myflash.swf
myflash.fla (not uploaded to the server)
xml_dir:myxml.xml
I created "sub1" and "sub2" just so that my swf would be the same number of directories downwards as the html has to link upwards, so that when I test the source file, it works. For the HTML, it's embedded like this (using swfobject):
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" width="800" height="500" id="../../../myflash_dir/sub1/sub2/myflash">
          <param name="movie" value="../../../myflash_dir/sub1/sub2/myflash.swf" />
                <!--[if !IE]>-->
                <object type="application/x-shockwave-flash" data="../../../myflash_dir/sub1/sub2/myflash.swf" width="800" height="500">
                <!--<![endif]-->
                <div>
                    <p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" width="112" height="33" /></a></p>
                </div>
                <!--[if !IE]>-->
                </object>
                <!--<![endif]-->
            </object>
And inside the Actionscript, I have a URL like this to load the XML:
../../../myflash_dir/sub1/sub2/xml_dir/myxml.xml
Testing the .fla works. But the swf does not work in the HTML. myflash.swf loads, but the loading animation spins and spins, so presumably myxml.xml is not loading. Can anyone see what I'm doing wrong?

Answer 1

Durrr, this is not the first time I've answered my own question. Maybe something about trying to explain it to someone else lets my brain make the critical connection.
Anyway, yes it was everything to do with the external SWFs being loaded. My main swf actually loads an xml containing URLs from which to load all of the other SWFs and so I had to update the URLs inside of that, and that fixed the problem.
Sorry for wasting forum space, but maybe this will help someone else out!