CDO field update

[andrew3254]

Hi I have the following code which sets up the SMTP server:

objCDOConfig.Fields.Item("http://schemas.microsoft.com/cdo/configuration/sendusing") = 25

objCDOConfig.Fields.Item
("http://schemas.microsoft.com/cdo/configuration/smtpserverport") = server

objCDOConfig.Fields.Update

I get the error saying unable to update fields. I got the code idea from
MSDN webpage, do I need to do some importing of files?