Here is the tutorial I wrote for this. Read thru it fully. You probably don’t need to do the Sync 3.0.20204 installation part, as you have this installed. But, if you did not install the newer voice file and Gracenotes (optional), you should fix that. If you did, then all is good.
The NAV section is what we are really concerned with here. Follow the instructions in the tutorial and see if this works for you.