บันทึกข้อมูลแล้วหาตารางไม่เจอครับช่วยทีครับมือใหม่ .NET, Ms SQL Server 2008, C#

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

public partial class register : System.Web.UI.Page
{
    String strSQL, strSQL1, strSQL2, strSQL3, strSQL4, strSQL5;
    SqlCommand objCmd = new SqlCommand();
    SqlCommand objCmd1 = new SqlCommand();
    SqlCommand objCmd2 = new SqlCommand();
    SqlCommand objCmd3 = new SqlCommand();
    SqlCommand objCmd4 = new SqlCommand();
    SqlCommand objCmd5 = new SqlCommand();
    SqlConnection objConn = new SqlConnection();
    String strConnString = "Server=localhost;Uid=sa;PASSWORD=1234;database=projecttest;Max Pool Size=400;Connect Timeout=600;";
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Btnsave_Click(object sender, EventArgs e)
    {
        try
        {
            objConn = new SqlConnection(strConnString);
            objConn.Open();
            strSQL = "INSERT INTO dbo.User (Username) VALUES ('" + username.Text + "');";
            strSQL1 = "INSERT INTO dbo.User (Password) VALUES ('" + password.Text + "');";
            strSQL2 = "INSERT INTO dbo.User (Name) VALUES ('" + nametxt.Text + "');";
            strSQL3 = "INSERT INTO dbo.User (Lastname) VALUES ('" + lasttxt.Text + "');";
            strSQL4 = "INSERT INTO dbo.User (Tel) VALUES ('" + teltxt.Text + "');";
            strSQL5 = "INSERT INTO dbo.User (Email) VALUES ('" + emailtxt.Text + "');";
            objCmd.Connection = objConn;
            objCmd1.Connection = objConn;
            objCmd2.Connection = objConn;
            objCmd3.Connection = objConn;
            objCmd4.Connection = objConn;
            objCmd5.Connection = objConn;
            objCmd.CommandText = strSQL;
            objCmd1.CommandText = strSQL1;
            objCmd2.CommandText = strSQL2;
            objCmd3.CommandText = strSQL3;
            objCmd4.CommandText = strSQL4;
            objCmd5.CommandText = strSQL5;

            objCmd.ExecuteNonQuery();
            objCmd1.ExecuteNonQuery();
            objCmd2.ExecuteNonQuery();
            objCmd3.ExecuteNonQuery();
            objCmd4.ExecuteNonQuery();
            objCmd5.ExecuteNonQuery();
            this.lblText.Text = "SQL Server Connected";
        }
        catch (Exception ex)
        {
            this.lblText.Text = "Recored can not insert Error (" + ex.Message + ")";
        }
    }
}