private void FillRegistrationGrid(long managerUserId, long managedUserId)
        {
            if (managerUserId == 0 || managedUserId == 0)
                return;

            int credits = Util.GetUserCredits(Util.UserId);

            using (Database db = new MySqlDatabase())
            {
                DataSet registry = db.GetRegisterWithManager(managerUserId, managedUserId);
                DataView dataView = new DataView(registry.Tables["Table"]);
                //RegistrationGrid.DataSource = dataView;
                //RegistrationGrid.DataBind();

                dlMyTracks.DataSource = dataView;
                dlMyTracks.DataBind();
            }
        }