Simple Scrollbar tutorial - need help

http://img143.imageshack.us/my.php?image=newscp7.swf

Hi everyone… above is a link to my file. I followed the Scrollbar tutorial here on Kirupa and everything worked fine. I then applied the code and tutorial to make my own scrollbar and content mask but for some reason on export the scrollFace starts in the middle of the scrollTrack rather than at the top to match the content.

Does anyone know what I’ve done wrong?