changing url to the other image

Hi,

I am using a cms template in joomla and trying to change a url path to picture (because I am not able to overwrite the one in the original template location)

THE ORIGINAL URL PATH LOOKS LIKE THIS:
div#header {
background: url(../images/header.jpg) top right no-repeat;
height: 265px;
width: 725px;

THE NEW LOCATION OF MY PICTURE IS
amd/10.9.0.10/home/export/html/coremark.sk/public_html/templates/pictures/header.jpg

SO, I TRIED TO PUT IT IN THIS WAY:
div#header {
background: url(amd/10.9.0.10/home/export/html/coremark.sk/public_html/templates/pictures/header.jpg) top right no-repeat;
height: 265px;
width: 725px;

BUT IT DOES NOT WORK

Any suggestions??
Many thanks