Application working on emulator but crashed on phone WP8 - windows-phone-8

Question

At start I'm sorry for my English is poor. And this is the only place where i solved the problem.
I have a problem with my application. I write and test it on emulator in VisualStudnio 2012 and It work fine. But when I add aplication in WindowsPhone store and I get to phone. It crashed. I think that problem is in geolocator or something with GPS, because when i use function where my it don't use gps it work. Everywhere where i use geolocator_geopositionchanged it break down and app is terminate. in one of application page i use map control but i gave token and application id but only in class where i use map.
private void maping_Loaded(object sender, RoutedEventArgs e)
{
Microsoft.Phone.Maps.MapsSettings.ApplicationContext.ApplicationId = "id";
Microsoft.Phone.Maps.MapsSettings.ApplicationContext.AuthenticationToken = "token";
}
Do you have any sugestion or advices?
if you want watching app there is a link
http://www.windowsphone.com/pl-PL/store/app/opencaching/06bce1e1-16ef-4ebf-ac53-23b4c725f78b
I have geolocator in a few class it's one of them
Geolocator code
if (!tracking)
{
gps = new Geolocator();
gps.DesiredAccuracy = PositionAccuracy.High;
gps.ReportInterval = 100;
gps.PositionChanged += geolocator_PositionChanged;
}
else
{
gps.PositionChanged -= geolocator_PositionChanged;
gps = null;
}
tracking = !tracking;
Geoposition changed code
void geolocator_PositionChanged(Geolocator sender, PositionChangedEventArgs args)
{
double distance = 0;
distance = point.GetDistanceTo(new GeoCoordinate(args.Position.Coordinate.Latitude, args.Position.Coordinate.Longitude));
string asa = Convert.ToInt64(distance).ToString();
if (asa != null)
{
Dispatcher.BeginInvoke(() =>
{
TBodleglosc.Text = asa +"m";
navi.Rotation = 180 + Kierunek(point.Latitude, point.Longitude, args.Position.Coordinate.Latitude, args.Position.Coordinate.Longitude);
});
}
}

Answer 1

Debug on your device. If that cannot repro, setup a Beta Test app and use that to distribute the app back to yourself for debugging. Sometimes signing breaks things.

Answer 2

I debug at lumia 920 and I have a problem with convert.toDouble
because there are was , i have . and vice versa
I think that it's connected with phone language
because in english emulator and Ertay Shashko phone who debug it yesterday it's working fine.
At now application work at phone but doesn't at emulator.
but if i change settings on location and language apps work but I can't debug because visual studio have error
It's weird .....