AD Objects in WinPE

[powaking]

Trying to get this autoit script to authenticate a password and group member in WinPE 2.0 (VistaPE)

$oMyError = ObjEvent("AutoIt.Error", "ComError")

$username = Inputbox("Username",'Enter your username',"","",200,100,-1,-1)
$password = Inputbox("Password",'Enter your password',"","*M",200,100,-1,-1)
$domain = ""
$group = ""

If Uservalidate($domain, $username, $password, $group) = 0 then
	MsgBox(16 + 262144, "Error", "Try again", 8)
EndIf

Func UserValidate($Domain, $UserName, $Password, $InGroup = "")
	Local $NameSpace = ObjGet("WinNT:")
	Local $ADS_SECURE_AUTHENTICATION = 0x0001
	Local $DomObj = $NameSpace.OpenDSObject ("WinNT//" & $Domain, $UserName, $Password, $ADS_SECURE_AUTHENTICATION)
	If @error <> 0 Then Return 0
	Return 1
EndFunc  ;==>UserValidate

Func ComError()
	If IsObj($oMyError) Then
		$HexNumber = Hex($oMyError.number, 8)
		SetError($HexNumber)
	Else
		SetError(1)
	EndIf
EndFunc  ;==>ComError

Keep getting errors on ObjGet command.

Before I pull my hair out is this even possible in WinPE2.0 environment? Am I wasting my time? Is there another method?