Custom Joomla 1.5 View cannot find the layout default.php file - joomla1.5

Question

I have been developing templates for Joomla 1.5 (obsolete one, yes I knew it. Unfortunately, I've been spending some time working with it and move on to newer version will be like starting from zero).
I tried to understand how Joomla 1.5 components work, especially for those using MVC principle, and somehow I managed to make things work, except now I have been stuck with the layout of a customized view. For unknown reason, Joomla could not read or find the layout (default.php) inside the folder com_hello2/views/viewed/tmpl and give '500 error Layout default not found'.
I tried to move the default.php file from folder to folder, looking if I could figure out where Joomla want me to put the default.php. It DOES work for the default view, located on com_hello2/views/hello2/tmpl.
Could anyone please help me with this problem?
Here are the codes from the controllers:
<?php
defined( '_JEXEC' ) or die( 'Restricted access' );
jimport('joomla.application.component.controller');
class Hello2Controller extends JController
{
function display($tpl = null)
{
$task = JRequest::getVar('task', null, 'default', 'cmd');
switch ($task){
case 'view':
$model = &$this->getModel('Viewed');
$view = &$this->getView('viewed','html');
$mylayout = 'default';
break;
case 'newstatus':
break;
default:
$view = &$this->getView('hello2','html');
$model = &$this->getModel();
$mylayout = 'default';
break;
}
$view->setModel($model,true);
$view->setLayout($mylayout);
$view->display();
}
}
?>
I created two models, one is the default Hello2ModelHello2, the new one is Hello2ModelViewed. I seperated the two models based on the tasks in the controllers.
the Hello2ModelHello2:
<?php
// Check to ensure this file is included in Joomla!
defined('_JEXEC') or die( 'Restricted access' );
jimport('joomla.application.component.model');
class Hello2ModelHello2 extends JModel
{
//add CC
function getComments()
{
global $mainframe;
$db = JFactory::getDBO();
$id = JRequest::getVar('id', 0, '', 'int');
$query = 'SELECT a.*'.
' FROM #__hello1 AS a '.
' LEFT JOIN #__content AS b ON a.article_id = b.id'.
' WHERE a.state = 1';
$db->setQuery( $query );
$comments = $db->loadObjectList();
return $comments;
}
}
?>
now the Hello2ModelViewed
<?php
// Check to ensure this file is included in Joomla!
defined('_JEXEC') or die( 'Restricted access' );
jimport('joomla.application.component.model');
class Hello2ModelViewed extends JModel
{
function __construct()
{
parent::__construct();
$id = JRequest::getVar('id', 0, '', 'int');
$this->setId((int)$id);
}
function setId($id)
{
// Set new article ID and wipe data
$this->_id = $id;
$this->_article = null;
}
//get certain comment only.
function getSingle()
{
global $mainframe;
$db = JFactory::getDBO();
$id = JRequest::getVar('id', 0, '', 'int');
$query = 'SELECT a.*'.
' FROM #__hello1 AS a' .
' LEFT JOIN #__content AS b ON a.article_id = b.id'.
' WHERE a.id = '.$id.
' AND a.state = 1';
$db->setQuery( $query );
$comments = $db->loadObjectList();
return $comments;
}
}
?>
the view.html of Viewed View is
<?php
defined('_JEXEC') or die( 'Restricted access' );
jimport( 'joomla.application.component.view');
jimport('joomla.environment.request');
class Hello2View extends JView
{
function __construct($config = array())
{
parent::__construct($config);
}
}
class Hello2ViewViewed extends Hello2View{
function display($tpl = null)
{
$model = &$this->getModel();
$id = JRequest::getVar('id', 0, '', 'int');
$comments = $model->getSingle();
JRequest::setVar('row',$comments);
parent::display($tpl);
}
}
?>
and view.html of Hello2 View is
<?php
defined('_JEXEC') or die( 'Restricted access' );
jimport( 'joomla.application.component.view');
jimport('joomla.environment.request');
class Hello2ViewHello2 extends JView{
function display($tpl = null)
{
$model = &$this->getModel();
$comments = $model->getComments();
JRequest::setVar('rows',$comments);
parent::display($tpl);
if($this->getLayout() == 'view') {
$this->view($tpl);
return;
}
}
}
?>
It works for me to execute index.php?option=com_hello2&task=display
but gets error when execute index.php?option=com_hello2&task=view
eventhough the default.php is already inside the directory views/viewed/
any input appreciated! :)