I really thought we had it there - with the "prism rotation" attribute (the space was inserted by the translate to English function - pity I didn't keep up my high school German).
But it still doesn't work. The prism is not something we need to use - we won't be using the fireworks in our usual productions, but I did want to get it right.
Perhaps someone with a Futurelight DMH-200 can have a look at it.
The latest is attached - do you want me to put it up through the web page?