CSS problem: Background image will not display

Stuck trying to build a wordpress (2.9.1)theme (with Starkers theme) from local host.

For some reason, the background image will not display.

The image is in a folder in the index folder. It shows in my browser (localhost/wordpress/images/head_bg.png

WordPress shows in the browser too, but I can’t the image to show.

Can you see anything in this CSS that looks suspicious?

/*
RESET
*/

* { margin: 0; padding: 0; }
html { overflow-y: scroll; }
html, body { height: 100%; }
body { font-size: 62.5%; font-family: Arial, sans-serif; color: #272727; background: url(‘images/header_bg.png’) top center repeat-x white; }
ul { list-style: square inside; }
ol { list-style: decimal inside; }
a { outline: none; text-decoration: none; }
a img { border: none; }
img { vertical_align: middle; }
table { border_collapse: collapse; }

/*
UTILITY
*/

.floatLeft { float: left; }
.floatRight { float: right; }
.clear { clear: both; }
.button { border: 1px solid #272727; background: white; padding: 3px 8px; -moz-border-radius: 5px; -webkit-border-radius: 5px; color: #272727; }
.button-hover { backgound: #990000; color: white; }

/*
STRUCTURE
*/

#page-wrap { width: 960px; margin: 0px auto -250px; min-height: 100%; height: auto !important; height: 100%; }
#push { height: 250px; }