your tpl (fragment) should look something like this when done edit:
{$tbopen}
<tr>
<td align="center" class="tdheader">
{$sortlinks}
</td>
</tr>
{$tbclose}
<br />
<span style="float:right">
{$pages}
</span>
{* SD - Mod: ajax search *}
<div id="search">
{$lang.AJAX_USER_SEARCH}
<div id="topleft" style="display:inline;">
<input type="text" name="user" id="user" class="form-input" autocomplete="off" />
<div id="suggest"></div> </div>
</div>
<div style="clear:both"></div>
no ?
what version you applying this to ?