在Asp.Net中的Report Viewer Control中获取401未经授权的错误

Question

protected void bnt_click1(object sender, EventArgs e)
{
    ReportViewer1.Width = 800;
    ReportViewer1.Height = 600;
    ReportViewer1.ProcessingMode = ProcessingMode.Remote;
    IReportServerCredentials irsc = new CustomReportCredentials("username", "password", "someserver:8080/Reports"); // e.g.: ("demo-001", "123456789", "ifc")
    ReportViewer1.ServerReport.ReportServerCredentials = irsc;
    ReportViewer1.ServerReport.ReportServerUrl = new Uri("http://someserver:8080/ReportServer");
    ReportViewer1.ServerReport.ReportPath = "/Masha/Returns"; //e.g.: /demo-001/test
    ReportViewer1.ServerReport.Refresh();
}

public class CustomReportCredentials : IReportServerCredentials
{
    private string _UserName;
    private string _PassWord;
    private string _DomainName;

    public CustomReportCredentials(string UserName, string PassWord, string DomainName)
    {
        _UserName = UserName;
        _PassWord = PassWord;
        _DomainName = DomainName;
    }

    public System.Security.Principal.WindowsIdentity ImpersonationUser
    {
        get { return null; }
    }

    public ICredentials NetworkCredentials
    {
        get { return new NetworkCredential(_UserName, _PassWord, _DomainName); }
    }

    public bool GetFormsCredentials(out Cookie authCookie, out string user,
     out string password, out string authority)
    {
        authCookie = null;
        user = password = authority = null;
        return false;
    }
}

我正在尝试在ASP.Net Project中嵌入SSRS报告查看器。我正在尝试连接到在报表查看器中显示报表的远程SSRS报表服务器。对于身份验证部分，我得到了这个：

  

401未经授权的错误

如何删除身份验证或绕过它？

我可以使用登录凭据通过Web浏览器访问报表服务器。