Windows autentication with WindowsPrinicipal

From: naijacoder naijacoder (naijacoder_at_toughguy.net)
Date: 08/30/04 

Date: Sun, 29 Aug 2004 21:11:45 -0700

Hello,
           I'm using Windows Authenetication with my code below with
Windows Principal.
I noticed that when i use IsinRole with "BUILT\Administrator its does
work fine but when i use
DomainName\GroupName it doesn't go.
Does anybody know what 'm doing wrong?
Pls forward ur ideas!
Thanks

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
        'Put user code to initialize the page here
        'Dim UserName As String = wp.Name
        Dim wp As New WindowsPrincipal(WindowsIdentity.GetCurrent())
        'If wp.IsInRole("DomainName\GroupName") Then
            If wp.IsInRole("BUILTIN\Administrators") Then
                'code
                Response.Redirect("welcome.aspx")

            End If
            If wp.IsInRole("BUILTIN\dministrators") Then
                'code
                Response.Redirect("Nowelcome.aspx")

            End If

    End Sub

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