ASP Problems Post Win 2003 Server Upgrade

Hi,

We recently upgraded our PDC, which has the Active Directory data on, to Windows 2003 Server, the web server remains on Windows 2000 server. Since the upgrade our ASP code is giving errors, the error on the HTML page, this is called from the hyperlink to the default page, is:

Technical Information (for support personnel)

• Error Type:
  (0x80070035)
  /illuminator/webreports/general/.../Library/securitycheckL4Members.asp, line 35

I have attached the securitycheckL4Members.asp for the full code, but here is an extract of the problem part. We use this similar security code to manage access to many other pages so until we get it sorted out we have had to remove this security from all the pages.

Dim strUsername, GrpList, adsUser, group, bValid
strUsername = Replace(ucase(Session("Uname")) , "\", "/")
'Response.Write strUserName
'Response.End

If Len(Trim(strUsername)) = 0 Then Response.Redirect("../noaccess.asp?err=1") 'No ID supplied
bValid = false
Set adsUser = getobject("WinNT://" & strUsername)

For Each group In adsUser.groups
'Response.Write group.name & "<br>"
If Trim(UCase(group.name)) = Trim(UCase("shr - NEWL Production Level 4 Team - gs")) Then
bValid = True
End If
Next

If strUsername = "BEERSA/DENISW01NEW" OR strUserName = "BEERSA/MICHAELR01NEW" Then
bValid = True
End If
'Response.Write bValid
'Response.End
If bValid Then
'Do nothing, grant access to pages.
Else
Response.Redirect("../noaccess.asp?err=2&username=" & strUsername) 'User not in SPPAdministrator group
End If

Line 35 is Set adsUser = getobject("WinNT://" & strUsername) in the extract of the code above.

What is the changes from Windows 2000 to 2003 that would make the validation against Active Directory fail in the ASP code?

We have tried: