why does my author page display only 9 posts?

hi my author page is only showing the author’s latest 9 posts. I want it to show all the author’s posts.

here is author.php:

<?php get_header(); ?>
<div id=”content”>
<div id=”leftcol”>
<!– This sets the $curauth variable –>
<?php
if(isset($_GET[‘author_name’])) :
$curauth = get_userdatabylogin($author_name);
else :
$curauth = get_userdata(intval($author));
endif;
?>

<h2>Posts by <?php echo $curauth->nickname; ?>:</h2>

<!– The Loop –>
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
• ” rel=”bookmark” title=”Permanent Link: <?php the_title(); ?>”>
  <?php the_title(); ?>,
  <?php the_time(‘d M Y’); ?> in <?php the_category(‘&’);?>

<?php endwhile; else: ?>
<p><?php _e(‘No posts by this author.’); ?></p>

<?php endif; ?>
<!– End Loop –>

</div>
<?php get_sidebar(); ?>
<?php get_footer(); ?>

any idea why? Thank you in advance!