i have change my sidebox footer image by replace the

.leftBoxFooter {
background-image: url(../images/boxbottom.jpg); in my css file

yes it show the boxbottom.jpg for my sidebox, including categories, specials , new products side box etc

but for my ez-page sidebox it didn't show up, why didn't it's in leftboxfooter as well? thanks for answering