Dynamic movieclip resize

[FONT=Century Gothic]So here is the situation. I have a flash movie. I have some dynamic XML being loaded and parsed for display in a mask with a customized scrollbar. I need the MovieClip to be resized to the appropriate height to fit all the dynamically loaded text that is displayed on the masked MovieClip, so that my scrollbar will scroll all the text, instead of just displaying the manually set height of the MC. I have tryed using txt.autoSize, which gets the textbox to hold all the dynamic text, but no matter what I do I cannot re-adjust the MovieClip height to fit all the text that is loaded unless I manually change the MovieClip height and re-compile the movie. Any ideas? Suggestions?[/FONT]