[Koha] editing opacusercss file to display logo

[Arnold]

hi,

I am trying to replace the koha logo with an image i copied to the koha
images folder, when i type the link in "opacsmallimage", the search bar
remains blank and displays no image, same thing if i write css code on
"opacusercss". 

link used in opacsmallimage - "../../images/new-logo.gif"

css code used in opacusercss - 

h1#libraryname {

width:220px;
}
h1#libraryname a {
background:transparent url(../../images/new-logo.gif) no-repeat scroll 0 50%;
padding:80px 0 0;
width:220px;
}
#fluid {
margin-left: 224px;
}

or maybe i am using the wrong url?

Thanks