I am trying to get my tomtom go910 to pair with an 08 Ford Taurus Sync system. I would like to use the car stereo speakers to hear the navigation voice from the tomtom. I have not been able to get the tomtom to find the SYNC speakers via bluetooth. I was hoping that the sync system would be seen as a hi-fi bluetooth speaker. Every time I try, the tomtom menu says no speaker found. Any ideas??