Outer Background

The outer background design isn't showing up once the email campaign is sent. This has happened 2x to me and I'm not sure why? The background photo is a Free Stock photo from Constant Contact. It shows up in the Test Email. But once it emails to everyone, my email shows no background with a color I didn't choose. It was supposed to be Christmas themed. But instead it was UGLY themed. LOL Any idea what I'm doing wrong?