Banner Problem

[rmcdaniels]

I had a rotating banner at the top of the page that I made using these instructions:



http://www.vbulletin.com/forum/showthread.php?t=170826





I wanted to make it a rotating banner that appeared between posts in threads using these instructions:



http://www.vbulletin.com/forum/showthread.php?t=123281





I can make a static banner using the following lines in the postbit template:



<tr>

<td class="alt1" align="center">

<a href="http://www.phantasmusa.com/"><img src="/banners/nam.jpg" alt="" border="0" /></a>

</td>

</tr>



But nothing appears if I try to reference the plugin that I made (which works fine for making a rotating banner in the header) like this:





<tr>

<td class="alt1" align="center">$random_banner[$random_number]</td>

</tr>





What am I doing wrong?