ASP MAIL

Maybe someone can tell me whats wrong with this. I am trying to send mail with an attachment but I keep getting this error:

Microsoft VBScript runtime error '800a01b6'

Object doesn't support this property or method: 'AttachFile'

I can send mail with any other properties set except for this one. I have a feeling it may be related to how the smtp service is set up on the server, but who knows?

Here is the code

<%
Dim objCDO
Set objCDO = Server.CreateObject("CDONTS.NewMail")
objCDO.To = "[email protected]"
objCDO.From = "[email protected]"
objCDO.Subject = "My Resume"
objCDO.Body = "Hello Blah. Here is a copy of my resume"
objCDO.Importance = 2
objCDO.AttachFile = "c:\resume.doc"
objCDO.Send
Set objCDO = Nothing
%>