Menu Grouping HOWTO?

Dear friends,

I would like to have a menu grouping item 'khimik', which contains two sub-items: 'manage issues' and 'add an article'. 'khimik' itself must lead to a page which gives the same choice i.e 'add an article' and 'manage issues'.

'add an article' leads to a form allowing the addition of a certain node type (which is 'khimik' for sure!) while 'manage issues' must call some dynamic page callback.

What I'm doing is (khimik.module):

function khimik_menu($may_cache)
{
	global $user;
	$items=array();
	
	$is_typist = user_access('create khimik');
	$is_editor = user_access('edit khimik');
	
	if($may_cache) {
	$items[] = array( 'path'=>'khimik', 'title'=>'khimik', 'access'=>($is_typist || $is_editor), 'callback'=>'khimik_page', 'type'=>MENU_ITEM_GROUPING);
	$items[] = array( 'path'=> 'khimik/add_article',  'title' => t('Add an article'), 'access' => ($is_typist || $is_editor), 'type'=>MENU_NORMAL_ITEM );
	$items[] = array( 'path' => 'khimik/manage_issues', 'title' => t('Issue management'), 'access' => ($is_typist || $is_editor), 'callback' => 'issues_manipulation_page', 'type' => MENU_NORMAL_ITEM);
	}
	return $items;
}

function khimik_page()
{
	$out = '';
	$out .= blah-blah-blah;
	return $out;
}

// how to reference a form for creation the node of 'khimik' type???
// of course there's hook_form() for this node type!

function issues_manipulation_page()
{
	$content = '';
	$content .= blah-blah-blah;
	print theme('page', $content);
}

For some reason 'khimik' tree is not shown for a user who has $khimik_typist===true.
All pages are available through manual path specification in a browser.
Drupal 4.6.x.

With the best regards,
Andrei