flash does not reload xml file.

This problem is discussed here (by someone else)

http://board.flashkit.com/board/archive/index.php/t-166491.html

I have an aspx page that makes changes to an xml file.
I have a flash movie that uses the xml file.
The flash movie reloads the xml file. It should now have the new changed xml file.
This is not what happens however. It just uses the old one from the cache.
The man in the above link uses random numbers at the end of the filename to get around this. I don't want to do this because I want the xml file to be loaded when the page is opened and having to tell it which xml file is the current one is messy.
Does anyone know how to get flash to reload the file instead of using the the cached version?

Thanks