XML files are really small. If that is all you are loading,
it should happen instantly, or close to it depending on the size.
Also if you are running it on your local machine, it will load very
fast unless you simulate the download.
But incase that is not the issue, your code looks incomplete,
or just headed down the wrong path. You should be useing a loader
class that has a series of events associated with it. Events like
"PROGRESS" and "COMPLETE". These events will fire automatically
when a file loads, and when a file is done loading. The Enter frame
event is not meant to handle loading. I would suggest using a class
like BulkLoader to handle all your loading needs.
http://code.google.com/p/bulk-loader/