Configure VU+ DUO with Quad AstraBlock

Thanks for reading my first post...

Setup :
- VU+ DUO
- Konig Quad Astrablock (4 connections) for Astra 19.2 and 23.5 DiSEqC 2.0
- Two cables are connected to the monoblock LNB

Problem :
I don't know how to correct setup the configuration with the (Black Hole) setup menu. For each tuner I can select many option (simple DiSEeqC A/B, advanced,...). For the moment both are configured as simple DiSEqC A/B.
The problem is that for the moment I can't record one program and see another one.
I also have an extra DiSCeqC switch (ABCD to LNB and 4 REC inputs) but when I place it between the VU+ and the LNB there is no signal anymore... :-(

Question :
Can someone help me with this setup ?

Thanks for the feedback...
 
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