Display Posts Written by an Author

I’m trying to figure out the Loop…

The author pages currently list the past 10 post by that author, but I want to list to include all posts by that author. I also wanted to change the formatting, but the changes don’t show up on the page.

http://prommafia.com/author/admin/

Any suggestions?

<!-- The Loop -->
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link: <?php the_title(); ?>">
<?php the_title(); ?></a>,
Categories: <?php the_category(',');?>
<br /><br />
  <?php endwhile; else: ?>
     <p><?php _e('No posts by this author.'); ?></p>

	<?php endif; ?>
<!-- End Loop -->