Lazuli style_logo.css question.

[mosingalong]

Added new header background img. and trying to position my logo in it. Problem is any change I try to make to the logo css causes my logo to disappear. Strangely, even changing the style_log.css back to it's original form doesn't bring the logo img. back.
Original css:
#logo {
width:300px;
height:80px;
padding:0 0 0 20px;
text-align:left;
background:url({template_url}/images/{company_logo}) 20px 20px no-repeat;
}
trying to change it to:
#logo {
width:300px;
height:60px;
padding:0 0 0 20px;
text-align:left;
background:url({template_url}/images/{company_logo}) 20px 20px no-repeat;
}


Any help would be appreciated, thanks.