css issue not changing background image

Hi

I'm having some issues with CSS - the css i've used is in "Sweetdate>Stying" and right at the bottom of the page.

Basically, I used the css provided by the theme developers and in that, it had an image of the lady on the home page behind the search box - when I change the image, the lady stays - I want the new image to show from the url I put in.

I've granted support access if you want to take a look.

Thanks
Farzan