block in header doesn't appears in drupal - drupal

Question

i added a block with some information through sitebuilding->block->addblock
and selected its region as header
But this block doesn't displays in header....any idea?
I am using drupal6
The code of page.tpl.php is as follows
<div id="header">
<div id="header_logo">
<?php if (isset($secondary_links)) : ?>
<div id="secondary-menu">
<?php print theme('links', $secondary_links, array('class' => 'links secondary-links')) ?>
</div>
<?php endif; ?>
<?php
// Prepare header
$site_fields = array();
if ($site_name) {
$site_fields[] = check_plain($site_name);
}
if ($site_slogan) {
$site_fields[] = check_plain($site_slogan);
}
$site_title = implode(' ', $site_fields);
if ($site_fields) {
$site_fields[0] = '<span>'. $site_fields[0] .'</span>';
}
$site_html = implode(' ', $site_fields);
if ($logo || $site_title) {
print '<h1><a href="'. check_url($front_page) .'" title="'. $site_title .'">';
if ($logo) {
print '<img src="'. check_url($logo) .'" alt="'. $site_title .'" id="logo" />';
}
print $site_html .'</a></h1>';
}
?>
</div>
<div id="primary-menu">
<?php if (isset($primary_links)) : ?>
<?php print $primary_links_tree; ?>
<?php endif; ?>
</div>
</div>
<!-- end header -->

Answer 1

I'm guessing header is defined in your theme .info file since you see it in the block page.
regions[header] = Header
But what I don't see is you printing the header region in the page template. If the region is named 'header', then you need to add this somewhere in your page template.
print $header;