Flash working in IE8 but not FF or Chrome

[rhonda427]

I have embedded the below code in a html file:

<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="700" height="300">
  <param name="movie" value="./vig2011-02-dk/vig2011-02-dk.swf?xml_path=./vig2011-02-dk/slides.xml" />
  <param name="quality" value="high" />
  <embed src="./vig2011-02-dk/vig2011-02-dk.swf?xml_path=./vig2011-02-dk/slides.xml" width="700" height="300" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash"></embed>
 </object>

In IE8 it generates the flash nicely, but both FF and Chrome shows "Load fails". I have cleared cache and deleted the cookie for the site in question, but nothing seems to help.

[rhonda427]

Found out that this had to do with a missing crossdomain.xml, but I can also understand that there could be severe security issues connected to using such a file. Based on that I only need the above flash, how could I make this file securely?
At this moment I have tested that the "normal" and unsecure file works well:

<?xml version="1.0" ?>
<cross-domain-policy>
<allow-access-from domain="*" />
</cross-domain-policy>

Thanks for any help :)