Background image not showing up on site

I added a background image thru upfront behind the text in the main body of my site. It shows up beautifully in the upfront editor. I saved it and did a test visit to my site thru the wp admin but the image doesn't show up. I checked by visiting my site directly, and no background image. The other edits I made were there but the not the background image. I went back into upfront, and it shows it in the editor. Why isn't this appearing on the site itself? I enabled access to the site. I'm not using any caching plugins at the moment. I waited to see if the image loaded last, but it didn't load at all. Please help and explain what's going on so we can get this fixed and I know how to address it in the future on other sites/pages.
Thank you!!!