I discovered your YJ Piecemaker module and installed it on my Joomla-Website. After I uploaded some pictures, set the path for it and enabled the Plugin. I refreshed the my homepage, and everything displayed was a white area. It seems, that the .swf file does not load properly.
The homepage is http://küche-kassel.de/
Are you sure your are posting in product assigned forum?
What is your CMS version?
: Joomla 2.5
Link to installation
Have you edited any files? If yes tell us which ones.
Is this personal or client website?