I'm sure it's something else.
if the service is updated the Flex should be calling the new service unless it's NOT just simple XML.
Thanks for your reply! I'm actually taking over a mini-project from a colleague who just resigned. I'm actually not a Flex/ActionScript developer. What do you think it is and what approach should I take to investigate this problem? Thanks!
I've found that the reloading of data from a url only happens in Internet Explorer. Firefox, Safari etc is fine. You need to append some random data to your url so IE thinks its calling a new url, else as you say it will cache so something like;
http://www.myURL.asp?data='someData' + '?ieDummyData=' + Math.random();
That will do the trick.