I had the same problem, it turned out that VAG-COM was interrogating the modem on my laptop rather than the controller but reporting it as OK. I solved the problem by disabling the internal modem in device manager which freed up the com port for the interface.
hope this helps
Hi
I'm trying to fit a new instrument cluster to my 2000 A4 2.5 TDI. I've got a 3rd party interface running with VAG-COM 409.1
I can access all of the modules and even write adaptation changes but for some reason I cannot change a single Soft Code using the Recode-07 feature.
for example...
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