Shoutbox

I've got the little 'front end' working in flash, a couple of input fields.

I've got the external xml file set up, ready for text to be added.

I've got the AS3 in flash updating the xml correctly.


The problem:
If I trace th XML object in flash the updated XML document is there (great!), but I can't for the life of me work out how to make flash save the updated xml file anywhere, prefereably overwriting the old xml file)


Any help/advice would be much appreciated!