So, i connected the HD receiver to AV1 Connection as V.MEM with DVI-I and coaxial cable to A4 Digital Audio input of the BV.
I now connected also the scart from the receiver to AV2 as V.AUX.
Now i can hear the digital audio broadcasts through V.MEM and the analogue broadcasts through V.AUX.
It is complicated but it works. Any ideas on what is the problem and a better remedy?