Body of email doesn't print when you "right click | print" .

I'm using System.Net.Mail to send an email confirmation to our accounting office once a request form is completed.  In my old application (written in coldfusion) they could right-click on the email in the inbox and select print.  With System.Net.Mail, they right-click and select print and the body of the email prints blank.  If they open the individual email and select print, the body of the email will print properly.  This is very odd.  Any ideas?    Here's part of my code for sending the email..

Dim mm As New MailMessage()

mm.To.Add(Session("UserEmail&qu ...