Need help with scrollbars

hey! i added a scrollbar to my dynamic text box and its working fine.
(http://delisadean.cfpatheater.com/, Biography page)

however, i want to hide it when there is not enough text in the box for the scrollbar to be needed. i have followed the tutorial on “hide/view the scrollbar component”
(http://www.kirupa.com/developer/mx2004/hide_scrollbar.htm) and it works
(http://delisadean.cfpatheater.com/, any other page), but when there is more text in the box than the dimensions of the text box, the text is scrollable but there is no scrollbar visible. i can click in the text area and scroll it with my mouse, but no scrollbar shows to click the arrows or drag the actual bar (no example online).

i do not know much actionscript so i need help finding the right code. i am using flash cs3, actionscript 2.0. thanks in advanced!