I have found this newsticker which is exactly what I need…
http://www.flashkit.com/movies/Animations/Banners/News_Sty-David_Ol-4380/index.php
The only problem is that when I open the file in flashprofessional8 and then publish it, the text gets all “jagged” and not as smooth as the original file… I would be very grateful if anyone could help me with this!