In your InfoPath form, in design mode, in the Fields task pane, you should have a secondary data connection to your XML file. Drag that onto the form in design mode. Preview and make sure you can see the data you intend to submit - you may have to change some controls, etc. Attach the file under the Options tab in a reply if you need help. Then you can preview & see what data you are submitting in filler, publish, and see if the data looks the same in the browser.
Hilary Stoupa
