Missing serial nr. on RD45 radio

[CVR]

I am trying to upgrade my C5x7 with an RD45 radio.
Unfortunately it turns out to be a bit of a challenge.

After updating to latest version Diagbox and lexia HW. The process is stil not done.

When trying to use the instal RD45 procedure via Diagbox, it never completes.

I have communication with the radio, and have updated the VIN. But Diagbox returns "Unknown computer" and when looking into the radio menu via Diagbox, the serial number is missing.
I can get the normal radio-functions to work, and the radio tells the microphone is faulty. "Since it's not there".
But I can't access the bluetooth menu or update the radio manually from Diagbox. Only read it.

Is it a faulty radio, or am I missing something?

EMF screen fw is 71.3. I was informed earlier that it preferably should be 72.2
Can that be the problem, or is the radio faulty?

Brgds and a happy new year

CVR