Find this in your template (I don't know what template cuz I'm unfamiliar with vbadvanced) and change the number in red:
Code:
<!-- main -->
<table class="tborder" cellpadding="3" cellspacing="1" border="0" width="100%" align="center">
<thead>
<tr align="center">
<td class="thead"> </td>
<td class="thead" align="left">Forum</td>
<td class="thead" width="400">Last Post</td>
<td class="thead">Threads</td>
<td class="thead">Posts</td>
</tr>