Everthing works, but Ambilight is only white

Hi there,
i have successfully got my Ambilight running with osmc and everything is fine with the internal grabber. Until then everything was very simple. With the external grabber I now have the problem that the Ambilight works and reacts to the image, but without colors, so it only glows white. I connected the grabber directly to my Dreambox via cinch cable, i.e. no spitter or converter. So I don't have the typical error sources.
There are different threads here and elsewhere, but they didn't help, because when I use Hypercon to get a screenshot of the grabber, it looks good, i.e. the colors are like on TV. Does anyone here have an idea about this?
Regards
Chris

Problem solved: in the config file "hyperion.config.json"was "NTSC" instead of "PAL"
.