Background Image Shows when logged in as Admin But not when logged out

So I have the following code to insert my background image:

html {
	background: url(https://chocolatesundaes.com/2014/wp-content/uploads/2014/04/bg.jpg) no-repeat center center fixed;
	-webkit-background-size: cover;
	-moz-background-size: cover;
	-o-background-size: cover;
	background-size: cover;
}

(I also tried just using wp-content/uploads/2014/04/bg.jpg as well.)

and this whole time I thought it was appearing the way that I wanted it to, until I started to look at the site without being logged in. The background pic doesn’t show up.

So this is how it looks logged in: https://chocolatesundaes.com/2014/wp-content/uploads/2015/06/Screen-Shot-2015-06-03-at-5.01.14-PM.png

and this is how it looks logged out: https://chocolatesundaes.com/2014/wp-content/uploads/2015/06/Screen-Shot-2015-06-03-at-5.03.32-PM.png

and here’s a link to the site: https://chocolatesundaes.com/2014/