Cannot create an instance for oraclecommand

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data.OracleClient;

using System.Configuration;

using System.Data;

namespace Employee

{

public partial class ChangePassword : System.Web.UI.Page

{

public void Page_Load(object sender, EventArgs e)

{

}

public void Updatepassword()

{

try

{

OracleConnection connUpdatepassword = new OracleConnection(ConfigurationManager.AppSettings["updatepassword"].ToString());

OracleCommand cmdUpdatepassword = new OracleCommand("insert_emp_info", connUpdatepassword);

connUpdatepassword.Open();

cmdUpdatepassword.CommandType = System.Data.CommandType.StoredProcedure;

cmdUpdatepassword.Parameters.Add(new OracleParameter("i_emp_id", Convert.ToInt64("568877")));

cmdUpdatepassword.Parameters.Add(new OracleParameter("i_emp_password", txtConfirmPassword.Text.ToString()));

int rows=cmdUpdatepassword.ExecuteNonQuery();

if(rows==1)

{

lblupdatemss.Visible=true;

}

connUpdatepassword.Close();

}

catch (Exception ex)

{

lblErrormsg.Visible=true;

lblErrormsg.Text=ex.Message.ToString();

}

}

public void btnSubmit_Click(object sender, EventArgs e)

{

Updatepassword();

}

}

}

 

This is my code i tried to create an instance but it shows an exception Message = "Object reference not set to an instance of an object."