how i give any <li> the possess bullet image?

i have tried

<ul id="contact_list">
    <li id="phone">local 604-555-5555</li>
    <li id="i18l_phone">toll-free 1-800-555-5555</li>
</ul>

with

#contact_list
{
    list-style: front zero inside;
}

#contact_list #phone
{
    list-style-image: url(images/small_wood_phone.png);
}

#contact_list #i18l_phone
{
    list-style-image: url(images/i18l_wood_phone.png);
}

to avail. wholly front appears. i wish any sole list vigilant have it's possess bullet, i accomplish css, without controlling credentials images.

edit : i have detected that, notwithstanding firebug tells me, list-style-image order being overridden somehow. i inline rule, so:

    <li id="phone" style="list-style-image: url(images/small_wood_phone.png);">local 604-555-5555</li>

then well. given i have manners exam box i'm controlling contains ul li selector, i'm certain since inlining gives opposite result.