Can't center my header

[Reecey]

Header code

<!-- logo -->
<a name="top"></a>
<td align="$stylevar[center]">
<table border="0" width="100%" cellpadding="0" cellspacing="0" align="center" background="$stylevar[imgdir_misc]/header_bg.jpg">
<tr></td>
<td align="$stylevar[left]"><td valign="top" width="296"><img src="$stylevar[imgdir_misc]/header_left.jpg" width="516" border="0"></a></td>
<td align="$stylevar[right]"><td align="right" valign="bottom"><img src="$stylevar[imgdir_misc]/header_right.jpg" alt="" /></td>
</tr>
</table>
</center>

<!-- /logo -->

<!-- content table -->
$spacer_open

$_phpinclude_output

Try that if it dont work post back