Understand that in general, I should be doing manual routing but using freerouter has saved me quite a bit of time. My question is this. I create the inner layers with a zone tied to either GND or VCC as appropriate and the zone is 1mm smaller in all dimensions as the size of the PCB. I route a trace from one of the GND pins on the top layer to the blind via which goes to the GND layer. I have also done this for VCC. I then save, export to a dsn file, open it in freerouter and click autoroute. It appears to completely ignore that there is a GND and VCC layer and even the fact that I have created initial traces to those layers.
Is there something I am missing in freerouter or in pcbnew that is preventing the autorouter from creating blind vias to these power and ground layers?