Sqlite error WP8.1

I'm developing Windows phone 8.1 app. I have problem with Sqlite database. I created one, and made file. Now i want to use that file in my app, and get data from it.

I did create like this:

 SQLiteConnection.CreateFile(@"C:\ProbaProbe\MySql.sqlite");

 SQLiteConnection m_dbConnection;
        m_dbConnection = new SQLiteConnection("Data Source=C:\ProbaProbe\MySql.sqlite;Version=3;");
        m_dbConnection.Open();
        string sql = "create table highscores (name varchar(20), score int)";
        SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection);
        command.ExecuteNonQuery();

And i inserted some data with INSERT statment. That works nice. Now, when i want to use that MySql.sqlite in Windows Phone 8.1 app, i have problems. I did this way:

 private async Task CopyDatabase()
    {
        string DB_PATH = Path.Combine(@"C:\ProbaProbe\MySql.sqlite");
        bool isDatabaseExisting = false;

        using (var db = new SQLite.SQLiteConnection(DB_PATH))
        {
            isDatabaseExisting = true;
            grad q = new grad();
            SQLiteCommand sqlComm = new SQLiteCommand(db);   
            string a = (db.Query<grad>("select * from grad")[0]).Ime;
        catch
        {
            isDatabaseExisting = false;
        }


    }

Problem is: Could not open database file: C:\ProbaProbe\MySql.sqlite (CannotOpen)

I think i'm missing something... Anyone? Thx