Report Viewer not sending credentials

using System;
using System.Collections.Generic;
using System.Data;
using System.Configuration;
using System.Net;
using System.Security.Principal;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Microsoft.Reporting.WebForms;
 
/// <summary>
/// Summary description for ReportServerConnection
/// </summary>
[Serializable]
public sealed class ReportServerConnection : IReportServerConnection
{
    
    public WindowsIdentity ImpersonationUser
    {
        get
        {
            // Use the default Windows user.  Credentials will be
            // provided by the NetworkCredentials property.
            return null;
        }
    }
 
    public ICredentials NetworkCredentials
    {
        get
        {
            // Read the user information from the web.config file.  
            // By reading the information on demand instead of 
            // storing it, the credentials will not be stored in 
            // session, reducing the vulnerable surface area to the
            // web.config file, which can be secured with an ACL.
 
            string userName =
                ConfigurationManager.AppSettings
                    ["ReportViewerUser"];
 
            if (string.IsNullOrEmpty(userName))
                throw new Exception(
                    "Missing user name from web.config file");
 
            // Password
            string password =
                ConfigurationManager.AppSettings
                    ["ReportViewerPassword"];
 
            if (string.IsNullOrEmpty(password))
                throw new Exception(
                    "Missing password from web.config file");
 
            // Domain
            string domain =
                ConfigurationManager.AppSettings
                    ["ReportViewerDomain"];
 
            if (string.IsNullOrEmpty(domain))
                throw new Exception(
                    "Missing domain from web.config file");
 
            //HttpContext.Current.Response.Write("NetworkCredentials<br>" + mUserName + "<br>" + mPassword + " <br>" + mAuthority + "<BR>");
            //HttpContext.Current.Response.Write(userName + "<br>" + password + " <br>" + domain);
            //return new NetworkCredential(mUserName, mPassword, mAuthority);//
            return new NetworkCredential(userName, password, domain);;
        }
    }
 
    public bool GetFormsCredentials(out Cookie authCookie,
                out string userName, out string password,
                out string authority)
    {
        authCookie = null;
        userName = null; 
        password = null; 
        authority = null;
        
        // Not using form credentials
        return false;
    }
 
    public Uri ReportServerUrl
    {
        get
        {
            string url =
                ConfigurationManager.AppSettings[
                    "ReportServerUrl"];
 
            if (string.IsNullOrEmpty(url))
                throw new Exception(
                    "Missing url from the Web.config file");
 
            return new Uri(url);
        }
    }
 
    public int Timeout
    {
        get
        {
            return 600000; // 10 Minutes
        }
    }
 
   
}