Migrating Apache server -> IIS - Need help!

Hey experts,

I'm setting up a IIS server with php and mysql on a windows 2000 machine with php 4.3.1.8 and mysql).    I developed the site on a apache server off my private connection, and now am moving it to a permanet host (SBC).  I installed php, uploaded my site, and now the page is broken here:

<?php
      $p = $_GET['p'];
?>

when I pull my page like index.html, it breaks because $_GET['p'] is undefined.  only pages that look like this work:  index.html?p=something.


the site is here: http://www.maveng.com:100/
here is my apache site:  http://66.68.108.80/  (slow!!!)

I also would like to know what I need to change to switch the server to http://test.maveng.com/?  I'm pretty sure I have the correctly setup on the actual server.... do I need to forward test.maveng.com from the whois record??  

Thanks,
-Chris