Smart campaign not working: "send email when added to program in last hour"

[Anonymous]

Hi,

I'm trying to send a recurring email to new leads upon submission of a form. Here's what I've got set up:

• I've created an engagement program
• Added members to the program by upload.
• Created a smart campaign using
  • trigger: Added to Engagement Program
  • constraint: In the last 1 hour
  • flow step: Send email (email selected).

I've activated the campaign, but no email is sent. 

Here's the larger scenario:

• Our Facebook Lead ad integration is not working (separate issue, logged a ticket).
• I'm getting a daily spreadsheet of leads, which I have to upload to Marketo.
• These leads are supposed to get a response email upon submission of the form.

I want to be able to add the leads to the program by upload when I get them, and have the email go automatically to just the new contacts (hence the "In the last 1 hour" consraint).

For my first pass at this I used an Email Program, but I can't set up an email program for every uploaded list. I want one I can just add to as needed.

Any help with this would be appreciated!