save the data in the Google Login database?

Hello, I am not able to save the data in the database !, the data is displaying normally but I can not extract them from the Label, I am using mySQL and WebForms.

GoogleDB.cs

    using System;
    using System.Collections.Generic;
    using System.Data;
    using System.Linq;
    using System.Web;

    /// <summary>
    /// Descrição resumida de GoogleDB
    /// </summary>
    public class GoogleDB
    {
    public GoogleDB()
    {
        //
        // TODO: Adicionar lógica do construtor aqui
        //
    }
    public static int InsertLogin(GoogleProfile usuario)
    {
        int retorno = 0;
        try
        {
            IDbConnection conexao;
            IDbCommand comando;
            string sql = "insert into usu_usuario values(0, ?usu_id_google, ?usu_nome, ?usu_email, ?usu_sexo, ?usu_tipo); select last_insert_id();";
            conexao = Mapped.Connection();
            comando = Mapped.Command(sql, conexao);
            comando.Parameters.Add(Mapped.Parameter("?usu_id_google", usuario.Id));
            comando.Parameters.Add(Mapped.Parameter("?usu_nome", usuario.DisplayName));
            comando.Parameters.Add(Mapped.Parameter("?usu_email", usuario.Emails));
            comando.Parameters.Add(Mapped.Parameter("?usu_sexo", usuario.Gender));
            comando.Parameters.Add(Mapped.Parameter("?usu_tipo", usuario.ObjectType));
            retorno = Convert.ToInt32(comando.ExecuteScalar());
            conexao.Close();
            comando.Dispose();
          conexao.Dispose();
        }
        catch (Exception e)
        {
            retorno = -2;
        }
        return retorno;
    }
}

web.config

<?xml version="1.0"?>
<!--
For more information on how to configure your ASP.NET application, please 
visit
 http://go.microsoft.com/fwlink/?LinkId=169433
 -->
<configuration>
  <appSettings>
    <add key="strConexao" value="Database=login_google; Data Source=localhost;user id=root; Password=root; pooling=false;"/>
  </appSettings>
<system.web>
<compilation debug="true" targetFramework="4.0"/>
</system.web>
</configuration>

MySQL Code

#DROP DATABASE login_google;
CREATE database login_google;
USE login_google;

CREATE TABLE usu_usuario(
usu_id INT PRIMARY KEY NOT NULL AUTO_INCREMENT,
usu_id_google INT NOT NULL,
usu_nome VARCHAR(100) NOT NULL,
usu_email VARCHAR(100),
usu_sexo VARCHAR(8),
usu_tipo VARCHAR(10)
);

Google Login

MySQL Dll for C #