CDO Email Attachment In JScript

I have a CDO mail script in JScript that works fine if I send the message without an attachment. However, I haven't been able to figure out how to attach a file without getting an error. Does anyone know how to attach a file to a CDO message in JScript?


<%@language="JScript" %>

<%
var cdoConfig = Server.CreateObject("CDO.Configuration");
cdoConfig.Fields("cdoSMTPServerName") = "12.34.56.78";

var cdoMessage = Server.CreateObject("CDO.Message");
cdoMessage.Configuration = cdoConfig;

var cdoBodyPart = cdoMessage.BodyPart;
cdoBodyPart.ContentTransferEncoding = "8bit";

cdoMessage.To = "name@company.com";
cdoMessage.From = "someone@mail.org";
cdoMessage.Subject = "CDO Test in JScript";
cdoMessage.TextBody = "This is a test email sent using JScript.";
cdoMessage.send();
%>

I've tried adding each of the following lines, but none of them works.

cdoMessage.AddAttachment "c:filesdocument.txt";
cdoMessage.AddAttachment( "c:filesdocument.txt" );
cdoMessage.Attachments.Add "c:filesdocument.txt";
cdoMessage.Attachments.Add( "c:filesdocument.txt" );
cdoMessage.AttachFile "c:filesdocument.txt";
cdoMessage.AttachFile( "c:filesdocument.txt" );