First, I wanted to connect the Xbox and the BluRay player together which however did not work! when the Xbox was made, the switch took the signal from the Blu-ray Player no longer; It followed that the Xbox would always be if I wanted to watch a bluray. it is out of the question!
I then started a second attempt, the Xbox connected to a single HDMI output and my receiver and Blu-ray player to the switch. Since then everything worked!
Apparently, the device does only with the Xbox hard what I can handle. Nevertheless, of course, a point deduction!