Trouble with IADs

Hey all,

I keep getting the following error

d:\programming\dynascript\dynascriptdlg.cpp(325) : error C2065:
'IADs' : undeclared identifier

A copy of my code is listed at the end of the post.

I am using VC++ (Visual Studio 2005) with Microsoft Platform SDK for
Win2k3 R2 installed, on a WinXP SP2 system.
..
I have added the the SDK Paths to project options as described in the
MSDN.

I have even tried on 2 different PC's incase something went wrong with
the SDK install the first time.

I have loked every where and cannot figure out what I'm doing
wrong... Any Assistance will be greatly appreciated.

// Code from my Program

#include <windows.h>
#include <activeds.h>
#include <Iads.h>
#include "stdafx.h"
#include "DynaScript.h"
#include "DynaScriptDlg.h"
#include "CrtCntrDlg.h"
#include "AddSys.h"

..
..
..

int CDynaScriptDlg::ImportOU() {

  HRESULT hr = CoInitialize( NULL );
  if (SUCCEEDED (hr) ) {

     IADs *piConnection = NULL;
     hr = ADsGetObject(L"LDAP://dummy.nonexist.local", IID_IADS,
(void**) & piConnection});
     if (SUCCEEDEED (hr)) {
        MessageBox("Successfully Conected to labs!");
        piConnection->Release();
        }

     // More ADSI Code will go here

     (void) CoUninitialize();

     }

   return (int)hr;
}