attachments with MAPISendMail

hi guys,

if i call send MAPISendMail(..) in the Send routione of Mapi.Send the
attachments are convertet in text that is attached in the text part of
the mail. it is not attached as files to the mail. how can i change it
that the attachments are attached as files and not as text.

here more or less the code that i use:


Mapi ma = new Mapi();
ma.Reset();

for (..){
ma.Attach(m_strAttach[i]); //m_strAttach[i] includes the complete
path+filename of the attachment
}

ma.Send(m_strSubject,m_strText);
ma.Logoff();


thanks a lot,
elmar