Trying to use <!--VBSEO_BOOKMARKS--> on showthread

I'm trying to use

<!--VBSEO_BOOKMARKS-->

In my SHOWTHREAD template but not having much luck.

Code:

<!-- toolbar -->
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center" style="border-bottom-width:0px">
<tr>
	<td class="tcat" width="100%">		
		<!--VBSEO_BOOKMARKS-->
</td>

Is what i'm using, but it isn't outputting the bookmarks. Even if I enable or disable the option, and no matter the setting for displaying them it wont show.

You can use <!--VBSEO_BOOKMARKS--> on postbit and postbit_legacy templates.