FileRef file upload - how to delete files?

I’m working with the fileupload tutorial found on kirupa.
http://www.kirupa.com/developer/flash8/uploading_fileReference_pg1.htm

I’m actually using the modified version by Masahigo found in the forum which is essentially the same with additional functionality.

So question #1, What is the code to DELETE a file that has been uploaded to the server using FileReference?

question #2
When the file uploads, the progress bar gets to 100 and that’s it. Why is the upload on complete function not executing? Is this a common problem, what’s the fix? Thanks

question #3
The progress bar only works sometimes. Does this occur when the jpeg is so small that it uploads almost instantly, not giving enough time for the progress function to fire???