I have taken the same steps as you and still have the same problem. I have
done a tracert -d to an internal IP address and it leaves my DSL router and
then says Destinsation Unreachable <Some IP address at my providor>. It
almost seems as though the tunnel never gets setup. I get an Internal IP
address assigned to the Extender without any problem and can only ping it,
nothing else in the subnet.