Account management from ASP.NET web

[MaDMaRTiGaN]

Hi,

I'm trying to create a web page which allows me to list the members of the local Administrators group of a client system. I found some code parts which can list the members (using WMI) but these cannot add or remove members from the group. I switched to using a DirectoryEntry object but when I run the code below, only one account is returned although the administrators group contains more (both local and domain) accounts. (note that txtOutput is a textbox on my webpage). Can someone help me out?

        Dim strComputer As String = "computer"
        Dim strAccount As String = "administrator"
        Dim strPassword As String = "secret"

        Dim locPath As String = "WinNT://" & strComputer & "/Administrators,group"

        Dim localGroup As DirectoryEntry
        localGroup = New DirectoryEntry(locPath, strComputer & "\" & strAccount, strPassword)

        Dim allMembers As Object = localGroup.Invoke("Members")
        Dim groupMember As Object

        For Each groupMember In CType(allMembers, IEnumerable)
            Dim member As New DirectoryEntry(groupMember)
            txtOutput.Text = txtOutput.Text & member.Path & vbCrLf
        Next