Something wrong with decrypt?

Hello!

In outlook '03, Gpg4win, I write a message and right click on the WinPT tray icon, current window, and encrypt. I select the one and only key I have, the one I created at install, and the message is encrypted. If I then send the message to myself and try to decrypt, I get the following error…

Broken OpenPGP message (maybe: quoted printable character in armor).

What is happening?

Many thanks.

Are you sure that you do not use HTML-mails?

I heard that with HTML-mails there can be problems, but I am not sure if it was with WinPT.