custom Bullets for sidebards are not working in firefox

The following is the code I have in the Atahualpa options/add html/css inserts. I wanted to have custom bullets for the links in my sidebars. The bullets work in IE 7.0 but not any other version of IE, or Firefox. How can I get these bullets to show up?

Site: www.silvergrove.kyschools.us

Setup bullets for LI items on sidebar */
div.widget ul {
list-style-type: none !important;
}

div.widget ul li a:link,
div.widget ul li a:visited,
div.widget ul li a:active,
div.widget ul li a:hover {
border-left: 0 !important;
padding-left: 0 !important;
}

/* Normal bullet */
div.widget ul li {
border-left: 0 !important;
padding-left: 15px !important;
background: url(J:/wp-content/themes/atahualpa/images/icons/bullet4.gif) no-repeat 0 3px;
}

.widget ul li {
/* 1.35 or more required for Safari or bullets too wide on the left */
margin-left: 1.35em;

/* overwrite existing display:block Firefox */
display: list-item;
}