changing Search Style 3 backgroung Image

Hi

How do I change the background image for the Search style 3. I’m using version 6.6.7 “Directory theme”

I tried to follow this however I can’t get the image to change. I wish to change the yellow background.

THIS = “To have it styled the same way (with the yellow background etc), you will need to add the following css styles to either your themes style.css file or using the box in the right hand side of the Design Setup page in admin:

.BasicSearchBox {
margin-top: -20px;
padding: 50px;
background: #fac564 url(img/bg1.png);
height: 450px;
color: #fff;
text-shawdow: 1px 1px 1px #000;
}
.BasicSearchBox h1 {
font-size: 60px;
font-weight: 600;
text-shadow: 0 2px 0 #666;
}
.BasicSearchBox .well {
margin-top: 30px;
max-width: 1100px;
background: none;
border: 1px solid #fff;
}

This did not work for me ?

Thanks