Attachment not sent of MIME format

[Ajay]

hi

i am sending the attachment using cdo nts in MIME format. The problem
is that the mail is going but the attachment is not send and the
message of http error 404 is shown in body of the mail. Moreover, when
i take the reference of cdo nts library in vb project, it shows only
two objects of it i.e newmail and session. iis 4.0 is installed and
the machine has nt server installed.
I am using the code of the following URL to send mail and the code of
the body is also similiar.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cdo/html/_denali_cdo_for_nts_library.asp