אני צריך עזרה בבניית האתר שלי web developer 2010

זה לא נותן לי להשלים את הפעולה מה הבעיה ?


using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;


namespace EthanProject
{

public partial class register:System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = @"Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|drivers.mdf;Integrated Security=True;User Instance=True";
string name = Request.Form["name"];
string where = Request.Form["place"];
string places = Request.Form["people"];
SqlCommand cmd = new SqlCommand("INSERT INTO tbldrivers (username ,fromwhere,places) VALUES ('" + name + "','" + where + "','" + places + "'", con);
con.Open();
object obj = cmd.ExecuteNonQuery();
con.Close();

}
}
}