In my Street Pilot volume goes to 0 every time I start the app, but if I use phone Volume control it overrides SP volume and it works. In volume page bar goes up and down, but np, must just push vol up in phone when you start navigating.
Voices go in "voice" folder in Garmin folder everywhere you put it, SDcard or External.(see pic in post n1)
I dont have issues when SP creates routes or recalculates, but I use Adv.Task Killer before starting SP.
I've tested SCDB yesterday, they appear on map (small icons on road) but proximity alerts don't work.
Probably sound problem affects them too or some files are missing in Garmin directory.