After 5 (!) attempts it finally worked.
Now I have the codec problem, because I have Vista Business x64. Well, at least kind of.
- the box sample, the earth and the water work perfectly
- the watercolor thing only shows a blue background without movement
- the grassy field shows an error message that "The dream may contain an invalid video type or a compatible MPEG-2 video decoder may not be present."
Is this one file indeed broken? Does it use a special codec? How many of the other dreams will work for me?
I am not really sure what I am supposed to do here. I wanted to pick DeskScapes up this weekend, but obviously I won't buy a program that doesn't work for me...
[Edit:]
Just found the mpg file belonging to the grassy field dream and it plays just fine in Windows Media Player. WTF?! Why can't DeskScapes play the video then?