Use VBcript to List Office Users form Active Directory

I have written vbscript to display a list of users from a particler office filtered
by the Office attribute and it is erroring outwith the message below, what is wromg
with thescript below?

D:\download\myscript1.vbs(15, 2) Microsoft VBScript runtime error: Object doesn't
support this property or method: 'objItem.physicalDeliveryOfficeName'

'On Error Resume Next

Const wbemFlagReturnImmediately = &h10
Const wbemFlagForwardOnly = &h20
strComputer = "."

   Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\CIMV2")
   Set colItems = objWMIService.ExecQuery("SELECT * FROM Win32_UserAccount",,48)

For Each objItem In colItems

      if objItem.physicalDeliveryOfficeName = "BS" Then
            Wscript.Echo objItem.Name + ", " + objItem.FullName
      end if

Next

Wscript.Echo "Done"