Error 2032 loading xml from swf

Question

Hello everyone.
I have a php site (based on Joomla! CMS). In one php page, there is a <object> element wich loads the Adobe Flex 1.5 swf file that I have developed (Slideshow.swf). This swf file is a slideshow that loads a xml file using a httpservice. The xml file contains the urls to the images to be shown. The error occurs when thw swf file tries to load the xml file, but not always.
- SITUATION 1: Visiting http://localhost/Slideshow.html or http://localhost/Slideshow.swf
  The html and the swf are the files generated by Adobe Flex builder.
  Navigators: IE 8, Mozila Firefox 3.5.5
   --> Yes, it works!!
- SITUATION 2: Visiting http://mydomaing.com/folder1/folder2/Slideshow.html or http://mydomaing.com/folder1/folder2/Slideshow.swf
  The html and the swf are the files generated by Adobe Flex builder.
  Navigators:
     IE 8 --> Yes, it works!!
     Mozila Firefox 3.5.5   --> I don't get Error 2032, but the images can't be found. This is another problem...
- SITUATION 3: Visiting http://mydomain.com
  Navigators: IE 8, Mozila Firefox 3.5.5
  --> No, it doesnt' work!! I get Error 2032!!
  The whole page loads. The swf loads, but when the swf tries to load the xml file, the fault event is throwed. Then I use an Alert.show. I'll give you as much information as I can:
ERROR MESSAGE (FOR SITUATION 3)
Message: faultCode:Server.Error.Request faultString:'HTTP request error' faultDetail:'Error: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2032"]. URL: ./slideshowGallery.xml'
Name: Error
Root cause: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2032"]
Error ID: 0
Fault code: Server.Error.Request
Fault detail: Error: [IOErrorEvent type="ioError" bubbles=false cancelable=false eventPhase=2 text="Error #2032"]. URL: ./slideshowGallery.xml
Fault string: HTTP request error
FLEX CODE
<mx:Application 
xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="init();"
The init method:
private  
function init():void{ 
httpService.send();
The httpservice element:
<mx:HTTPServiceid="httpService"url="
./slideshowGallery.xml"resultFormat="
e4x"fault="httpService_fault(event);"
result="httpService_result(event)"
/>
I think the handlers don't care. In SITUATION 3, the send() invocation always triggers the fault handler.
The xml file is in the same folder as the swf file (I use ./slideshowGallery.xml for the url field of the httpservice element).
This is the html code generated by the php page of my site:
<div id="ol-flashheader">
<object type="application/x-shockwave-flash" data="/templates/mx_joofree2/images/header.swf" width="700" height="240">
<param name="wmode" value="transparent" />
<param name="movie" value="/templates/mx_joofree2/images/header.swf" />
</object>
</div>
Note: header.swf is my Slideshow.swf renamed.
Ah, I have also a cross-domain policy file: http://mydomain.com/crossdomain.xml. And the following is curious. The content is:
<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy
SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
  <allow-access-from domain=www.mydomain.com />
  <allow-access-from domain="mydomain.com" />
  <allow-access-from domain="*.mydomain.com" />
</cross-domain-policy>
But when i visit http://mydomain.com/crossdomain.xml with IE 8 what i see is:
<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy
SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd">
<cross-domain-policy>
  <allow-access-from domain=www.mydomain.com secure="true"/>
  <allow-access-from domain="mydomain.com" secure="true"/>
  <allow-access-from domain="*.mydomain.com" secure="true"/>
</cross-domain-policy>
But, when i visit that url with Firefox... correct, It doesn't adds the secure="true" attributes!! jajaja
Please, I need some advise to solve this problem.
Thank you very much.
When I visit the web page (www.mydomain.com) and the swf tries to load

Answer 1

I haven't found the solution yet, but i can give more info:
I have modified the crossdomain.xml file to set secure="false". This way, when you view it with Internet Explorer, you can see secure="false" instead of secure="true". But this didn't solve the problem.
I have read somewhere that avoiding Internet Explorer to cache files, could help. So, I have added the next line to the <header> section of the php page that contains the <object> tag that loads sthe swf file:
<META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE">
This didn't solve the problem.
Regards.