CTRL+3 Kommunicator screenshot is blank/black

When I want to Upload a screeshot of the Renderer EX9
The content window is blank…

https://vvvv.org/sites/default/files/imagecache/large/images/Blank%20Snapshot.png

operating system?
graphic card?
graphic card driver?

Well other machine with nvidia works fine ;-)
https://vvvv.org/sites/default/files/imagecache/large/images/_FloatingCubes-DirectX%20Renderer.png

forum-alpha/kommunicator-dont-work