Make sure you have all your code correct and that you're pointing to the actual location of the image. This following is assuming that the image is located in the vshare/templates/images folder.

Code:
body {
font-family: Arial, Helvetica, sans-serif;
font-size: 12px;
background-color: #cccccc;
background-image: url ('../images/YOURIMAGE.jpg');
color: #222222;
margin: 0px;
padding: 0px;
}
If that background-image directive doesn't work, try this one. I find that it works better with FF. Place inside the BODY class in your styles.css as you would above. It's the same code I use for skins that have back ground images such as this one http://webgeek-design.com/index.php?act ... oductId=71

background-image: url("../images/YOURIMAGE.jpg");background-repeat:repeat;background-attachment: fixed;