I've created a route with 2 waypoints in Basecamp for Windows, and 'sent to device' - the device is a Nuvi 42. On the Nuvi 42, I go to 'Where to', then 'Favourites' and choose the ultimate destination from the list. The route and the 2 waypoints appear on the screen - except that the calculated route doesn't go through the waypoints. How do I make the calculated route go via the waypoints?