Testing movie in CS4 produce nothing but a black window... help!

I followed this tutorial: http://broskies.net/temp/tut.html but I work in CS4.
I followed the tutorial to the letter, but apperantly there is something wrong… All I see when I test the movie is this:

I tried to change the publish settings back and forth, but using Flashplayer 8,9 or 10 and actionscript 2.0 or 3.0 doesn’t make any difference.

Please, help me, my head is already bloody enough after all head banging…