RSS feed icon in forumdisplay

[medicalforums]

Can anybody tell me why this RSS icon not showing in my forums!

I added this in the forumdisplay template

<td class="vbmenu_control" id="forumsearch.subforums" nowrap="nowrap"><a href="search.php?$session[sessionurl]f=$foruminfo[forumid]" rel="nofollow">$vbphrase[search_this_forum]</a> <if condition="$show['quicksearch']"><script type="text/javascript"> vbmenu_register("forumsearch.subforums"); </script></if></td>
</if>

<td><a href="external.php?type=rss2&forumids=$foruminfo[forumid]"><img src="images/added/feed-icon-animated.gif" height="14" width="14" alt="Feed Icon" title="Subscribe to $foruminfo[title]'s RSS Feed"></a></td>

</tr>
</table>