background image not working

[colhiogroup]

I've done this before and it worked, but it's not working now--I want to add a background to the site's header. I've uploaded the banner to the images folder in the media manager. Using custom css and the header height has changed, but the image doesn't appear (I've tried with jpg and png versions of the image, neither appears). Don't think it should matter, but the image is 1600x400. Here's the custom css, what am I missing here?

 

 

.header-wrapper {

  height: 400px;

  background-image: url(../images/banner2.jpg);  /*  I've also tried (images/banner2.jpg) and ("images/banner2.jpg")  */

}

[Kristian]

This section is only visible with a valid subscription. If you have a valid subscription, please login.

[colhiogroup]

This section is only visible with a valid subscription. If you have a valid subscription, please login.