SENDMAIL PROBLEM IN OFFICE OUTLOOK 2003

Dear Sir,
I have configured microsoft outlook 2003 with my mail address “shahtejas72@gmail.com”.Pop server address is pop.gmail.com (port 995) and for smtp-smtp.gmail.com (port 465)Selected “yes” option in both option-This server requires an encrypted connection[SSL].
Now problem is that I can receive my each and every mail.But when I compose new mail and try to send there is a message appear on screen “Interface not registeres”. What does it means and what I have to do to send my mails through outlook.Please help me earliest.

Tejas Shah
[shahtejas72@gmail.com]