I think I fixed the problem. The SFTP server that I set up was not allowing transmission from the server that FlashFXP was set up on. I was just able to execute a scheduled task to deliver a file, and I had no problems once the destination server was configured to accept transmissions from the other box. I also tested a transmission that would fail (I changed the name of the destination folder), and I got 'Error' in email message, as I expected.
Thank you for your help.