Send mail via SMTP

Hi everyone,
I want to send email "silently" via COM interface but I have currently unsolvable problem.I have created account
over PDFCreator GUI with all required parameters (server, port,username etc). I have AccountID from registry
(maybe thet's the problem) every one of my attempts ends with this message
"error code: The property "EmailSmtpSettings.Accountid" does not exst!
Any idea?
Best
Danijel