centered in ff, but not ie

I’m having an issue with the horizontal positioning of only my home page on my site only in internet explorer. It looks great in firefox. The home page is left justified, and I want it to be center justified like the rest of the pages.

`<title>1030 Interactive, LLC</title>
<?php get_header(); ?>
<div id=”content”>
<?php if (have_posts()) : ?>

<?php while (have_posts()) : the_post(); ?>
<li class=”post” id=”post-<?php the_ID(); ?>”>
<div class=”title”>
<h2><?php the_title(); ?></h2>
</div>
<div class=”entry”>
<?php the_content(‘<span>Read more »</span>’); ?>
</div>

<?php endwhile; ?>

<?php else : ?>
<p> </p>
<h2 class=”t-center”>Not Found</h2>
<p class=”t-center”>Sorry, but you are looking for something that isn’t here.</p>
<?php endif; ?>
<span class=”footer”></span>
</div>
<?php get_footer(); ?>
`

Thanks!