Android Question GPS start/stop problem

ACTIVITY:

Sub Activity_Create(FirstTime As Boolean)
    StartService(Service1)
End Sub



SERVICE1:

Sub Service_Create
    'PUT SERVICE IN FOREGROUND STATE - SO THAT SERVICE WILL NOT BE KILLED BY OS
    Log(" put service to foreground")
    Dim sNotif As Notification
    sNotif.Initialize
    sNotif.Icon = "icon"  ' empty string will cancel notification ...
    sNotif.OnGoingEvent = True
    sNotif.SetInfo("PD","Service Running",Main)
    sNotif.Sound  = False
    sNotif.Vibrate = False
    sNotif.Notify(1)
    Service.StartForeground(1,sNotif)
End Sub


Sub Service_Start (StartingIntent As Intent)
    'ENABLE GPS
    If GPS1.GPSEnabled = False Then
    ToastMessageShow("Please enable the GPS device", True)
        StartActivity(GPS1.LocationSettingsIntent)  
    Else
    GPS1.Start(1000,0) 'Listen to GPS with no filters
    End If
End Sub


Sub Service_Destroy
    GPS1.Stop
    Log(" GPS1.Stop")
End Sub