I am not sure about the fla that you posted the link to - I haven't really looked at it, but it sounds like it has to do with the way they are scrolling that text.

Try this:

Add a mask layer in front of the text layer in that FLA file, which is the SAME dimensions as the frame part of the news scroller. This will only show the text when is is within the dimensions of that mask layer. The test will still scroll to the top of the screen, but it will not be viewable to the end user.

RH