Please help with a Flash/XML problem!

Hi, everyone. I’m a newcomer (both here and to Flash) and need some help in Flash/XML.
I’ve downloaded a file from Flashkit:
and would like to make a modification to it. What I’m trying to do is replace the editable textboxes with either a text area box or a multiline text box. Just changing the textbox to multiline didn’t work. I’ve tried to contact the author by email but no luck, so I’m hoping some kind soul here can help!
Thanks in advance!