Does the example code work on your device without the 601 error?
If the example works, the ActivityStarter can display a route. The code is different whether the destination is a street address or geocoordinates.
Is the destination described using geocoordinates (this is the preferred way to locate the parking lot) or a street address? If street address, please post an example address.
Either replace the address that is hard coded as 'Via Alessandro Manzoni' with a TextBox or another way to change the address for other parking lots (requires much more code).