Different list style image for each li

I've got a problem with some ul and li...

I'd like to create an unordered list with 3 li and each li has got a different list-style-image...

I wrote this code but the image don't appear...

Can you help me? Thanks!

EDIT: Post updated with HTML code ;)

<div id="right_main">
<ul id="mainFeatures">
<li id="wishlist">Some text here...</li>
<li id="sharing">Some text here...</li>
<li id="linking">Some text here...</li>
</ul>
</div>

#right_main ul#mainFeatures {
    height:250px;
    width:350px;
    overflow:hidden;
    margin-left:25px;
}
#mainFeatures li {
    font-weight:bold;
    font-size:22px;
    font-family:"Myriad Pro", sans-serif;
    padding:5px;
}
#mainFeatures li#wishlist {
    list-style-image:url(im开发者_运维知识库ages/wishListImage.png);
    list-style-position:outside;
}
#mainFeatures li#sharing {
    list-style-image:url(images/sharingListImage.png);
    list-style-position:outside;
}
#mainFeatures li#linking {
    list-style-image:url(images/linkingListImage.png);
    list-style-position:outside;
}

Most likely, your images were cut off by overflow: hidden. I've removed that and it works now: http://jsfiddle.net/ahwhj/

Use as background can be done too. Example http://jsfiddle.net/huhu/r7kSf/

If your html doesn't show properly in stackoverflow, it may contain errors. Try posting without the code format.

#check li {
    background: url(message.png) no-repeat -34px 7%;
    background-origin: content-box;
    background-size: 32px;
    float: left;
}