Flash program functions differently for different domains

This is a really peculiar problem. I have a linux distribution server, SME Server, and I use it to direct several domain names to a website on the server. My Flash program is a data driven directory that uses PHP constructed XML files to create the directory. I have been successfully using this Flash directory for some time using one particular domain, ictytranscripts.dyndns.org. I’ve since added a second domain name that I want to replace the first with, but for some reason the Flash program cannot read the XML files, or something. Whatever it is, the directories are not showing up.

There is nothing in the ActionScripts that have any reference to the old first domain name. I cannot imagine what is making the difference. Here is a test page showing the Flash program working successfully (I assume):

http://ictytranscripts.dyndns.org/indexTEST.html

And now the same page from different domains that direct to the same page:

http://www.ictytranscripts.org/indexTEST.html

http://www.symbiota.net/icitydb/indexTEST.html

Notice that in the first the Flash program comes up, but there is no data displayed and in the second, there is no Flash program displayed at all.

The XML files seem to be generated without any problems. Here is an example:

http://ictytranscripts.dyndns.org/XML/TrialDtTree.php

http://www.ictytranscripts.org/XML/TrialDtTree.php

http://www.symbiota.net/icitydb/XML/TrialDtTree.php

I am completely mystified. If anyone is seeing displays that do not appear as I suggest, let me know.

And any suggestions, tips or clues would be appreciated.