[toonysnn]

So you've set "Enable Social Bookmarking" to "Yes" in Admin CP > vBulletin Options > Thread Display Options (showthread)?
If so, make sure all the bookmarks that you want enabled are enabled in Admin CP > Social Bookmarking Manager

If those are not the problem, in your "SHOWTHREAD" template, does it have this (see html)?

<if condition="$bookmarksites">
<!-- social bookmarking links -->
    <br />
    <table cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" class="tborder" align="center">

    <tr>
        <td class="thead" colspan="$bookmarkcolspan">$vbphrase[bookmarks]</td>
    </tr>
    <tr>$bookmarksites</tr>
    </table>
<!-- / social bookmarking links -->
</if>