Golf 4 engine control unit programming

Hello,

We installed an AUQ engine in a Golf 4, but now we're having trouble connecting the engine control unit to the WFS3.

The login codes for both control units are present and functional. The problem lies in the fact that when accessing the MSG (Main System Gateway) and navigating to "Adjustment" -> "Channel 50", you need to enter the login code from the WFS3. If you do that and click "Test," you'll get the following message:
"System n.i.O."
I suspect the problem is that the current MSG (Message) contains a Seat chassis number, or that it's being displayed incorrectly in the Extra system. The part number for the MSG is 06A 906 032 HN, which suggests it's a control unit for a VW engine?
According to Google, the message "System n.i.O." indicates a problem with connecting a Seat control unit to a VW vehicle.
What can I do now?

Is it equipped with an IMMO III AI system?

Yes, an IMMO3 control unit is installed in the speedometer.