Insert EO grid view data into the database

Hi all,
 
I am using Essetial Object grid in one of the webappliction i tried the following C# code.. but could able to bind the data in EO.grid view but unable to save the data ( edited in the grid ) into the data base..
Please help me out in finding the solution for this..

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using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Data.Sql;
using System.Data;
using EO.Web;
using EO.Web.Internal;

public partial class _Default : System.Web.UI.Page
{
    public static string connectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Documents and Settings\mshamanna\My Documents\Visual Studio 2010\WebSites\EOTest2\App_Data\Database.mdf;Integrated Security=True;User Instance=True";

    protected void Page_Load(object sender, System.EventArgs e)
    {
     
        string sql = @"select * from Temp";
        SqlConnection conn = new SqlConnection(connectionString);
        SqlDataAdapter da = new SqlDataAdapter();
        SqlCommand cmd = new SqlCommand(sql, conn);
        da.SelectCommand = cmd;
        DataSet ds = new DataSet();
        da.Fill(ds, "Temp");
      
        Grid1.DataSource = ds.Tables[0];
        Grid1.DataBind();    
     
    }

//To Save grid values into database
    protected void btnSave_Click(object sender, System.EventArgs e)
    {
        string header3 = "";
        int id = 0;

        SqlConnection conn = new SqlConnection(connectionString);
        conn.Open();
        int count = 0;

       foreach (EO.Web.GridItem item in Grid  1.Items)
       {
           count++;
            //Get the cell value in the second column
           header3 = (string)item.Cells[2].Value;
          
            string sql = @"UPDATE TEMP SET HEADER3='" + header3 + "' WHERE ID='" + count + "'";

            SqlCommand cmd = new SqlCommand(sql, conn);

            cmd.ExecuteNonQuery();

        }

        conn.Close()

   
    }

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