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Are you using a "generic" OBD scanner, or do you have a registered copy of VAG-COM? That fault is telling you to scan your second ECM for faults that are stored there.
Did you scan the second ECM? Will your scan tool connect to the ECMII?
I don't understand your last comment
What kind of scan tool are you using? The second ECM should be communicating, since it is telling the first one it has a fault stored. If the second ECM were unresponsive, you would get a fault for missing communication.
You need to be using a scan tool that will read that second ECM- a factory scan tool, or VAG-COM software from Ross-Tech with an appropriate connector to the OBD port. That second ECM is where the fault is stored.