You might want to use the Collaboration Data Objects instead.
omsg = createobject("cdo.message")
omsg.From = "sender's email address goes here"
omsg.Subject = "The subject of your e-mail"
omsg.To = "Recipient's email address"
omsg.TextBody = "The body of your Text goes here"
omsg.AddAttachment("file:///"+"fullpath of file attachment")
omsg.Send

Let me know if this worked out for you.

Robert Lee