Email Attachments and MS Outlook

I've been struggling with this for a few hours now.

I created a test setup using the phpMailer.php and form2.php scripts, and modified them for the necessary field information.

The form itself appears to be working correctly, uploading files and sending emails.

However, although, the file attachments can be viewed and opened in several web-mail clients that I have tested, the same attachments are not included in the emails delivered via MS Outlook 2007. Instead, the file appears to be translated into some kind of text code instead of being delivered as a jpg attachment.

Since the attachment is being delivered properly in the web-mail clients (e.g. Yahoo.com and Comcast.net Mail) but not via a POP3 delivery into Outlook - I suspect something must be set wrong in my Outlook program. (Although - regular emails with file attachments ARE working just fine in my Outlook, it is only the FormM@iler file attachments are not appearing as attachments.)

Any insites?