Copy prepopulated Sqlite Db to Windows Phone 8 device

I'm using this code to copy a SQLite DB to the device:
public static bool CopyEmbeddedDatabaseToWriteableDirectoryIfNeeded()
{
string filename = "Fruktose.db3";
IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication();

        if (!iso.FileExists(filename))
        {
            using (Stream source = Application.GetResourceStream(new Uri(Path.Combine("Assets", filename), UriKind.Relative)).Stream)
            {
                using (IsolatedStorageFileStream destination = iso.CreateFile(filename))
                {
                    source.CopyTo(destination);
                }
            }

            // get the full path of the created file
            using (var file = iso.OpenFile(filename, FileMode.Open))
            {
                Debug.WriteLine(file.Name);
            }

            return true;
        }
        else
        {
            return false;
        }
    }

With this code I create a connection:
public SQLite.Net.SQLiteConnection GetConnection()
{
var plat = new SQLite.Net.Platform.WindowsPhone8.SQLitePlatformWP8();
return new SQLite.Net.SQLiteConnection(plat, DbPath);
}

    private string DbPath
    {
        get { return Path.Combine(ApplicationData.Current.LocalFolder.Path, "Fruktose.db3"); }
    }

But there I get a FileNotFoundException.
The Output Window of Visual Studio confirms that C:\Data\Users\DefApps\AppData{AC0B3218-28DE-47D1-AB68-E9638AE6A827}\Local\Fruktose.db3 exists.
DbPath points exactly to this file: C:\Data\Users\DefApps\AppData{AC0B3218-28DE-47D1-AB68-E9638AE6A827}\Local\Fruktose.db3.

I have exactly the same behavior on device and emulator.