No remote control & tally to BMSC6kP

Hello,

I have a remote control & tally issue over SDI for a Studio 6k Pro camera.
My setup is this:
- ATEM Mini Extreme ISO
- ATEM input 1: ProPresenter monitor signal
- ATEM input 7: Sony A7C directly with HDMI cable
- ATEM input 8: BM Studio Camera 6K Pro over SDI converted at ATEM to HDMI through a mini SDI-HDMI 12G

My issue with camera control & tally:
1. it works without issue directly with HDMI cable but the distance is greater and budget does not allow for wireless HDMI
2. after reading the mini converters manual I have decided to buy 2x30m Canare 12G pre-made cables + BiDirectional 12G mini converter.
3. I've set the Camera ID 8 in the camera & mini converter
4. I've made sure to have the latest firmware on all equipment
ATEM Mini Extreme ISO - Version 9.5.1, Build 5aaacf93
BiDirectional SDI/HDMI 12G - Version 9.0.1, Build 0cfe5966
Studio Camera 6K Pro - Version 8.2, Build 34dd65fb
5. I have searched the internet for a plugin sequence for the BiDi but I didn't find anything.

According to the converters guide this should work:
- connect camera SDI out to converter SDI in
- connect camera SDI in to converter SDI out
- connect converter HDMI out to ATEM HDMI input 8

but unfortunately I get nothing.
I had everything on a workbench (dining table ) and when I plugged in the direct HDMI cable it started working instantly.