I have little knowledge of web languages. This is the email I got from the application that is holding the data.
"The setup in Metrix is OK – just checked. Do you have a web service running on that address listening? You need to have something listening for the data – it cannot write to a folder on that address"
There is a module on the Saas application that allows me to state the URL that I assume the xml is sent to. Does that help?