some ACL problem

i have install acos,aros,aros-_acos table and add some code from
http://book.cakephp.org/view/1543/Simple-Acl-controlled-Application
step by step,by i have error:
Warning (512): DbAcl::check() - Failed ARO/ACO node lookup in
permissions check. Node references:
Aro: Array
(
[User] => Array
(
[id] => 1
[username] => test
[group_id] => 1
[created] => 2010-11-25 09:06:17
[modified] => 2010-11-25 09:06:17
)

)

Aco: /Products/index [CORE\cake\libs\controller\components\acl.php,
line 273]
Code | Context

if (empty($aroPath) || empty($acoPath)) {
trigger_error(__("DbAcl::check() - Failed ARO/ACO node
lookup in permissions check. Node references:\nAro: ", true) .
print_r($aro, true) . "\nAco: " . print_r($aco, true),
E_USER_WARNING);

$aro = array(
"User" => array(
"id" => "1",
"username" => "test",
"group_id" => "1",
"created" => "2010-11-25 09:06:17",
"modified" => "2010-11-25 09:06:17"
)
)
$aco = "/Products/index"
$action = "*"
$permKeys = array(
"_create",
"_read",
"_update",
"_delete"
)
$aroPath = array(
array(
"Aro" => array()
)
)
$acoPath = false

DbAcl::check() - CORE\cake\libs\controller\components\acl.php, line
273
AclComponent::check() - CORE\cake\libs\controller\components\acl.php,
line 92
AuthComponent::isAuthorized() - CORE\cake\libs\controller\components
\auth.php, line 527
AuthComponent::startup() - CORE\cake\libs\controller\components
\auth.php, line 445
Component::triggerCallback() - CORE\cake\libs\controller
\component.php, line 186
Controller::startupProcess() - CORE\cake\libs\controller
\controller.php, line 527
Dispatcher::_invoke() - CORE\cake\dispatcher.php, line 187
Dispatcher::dispatch() - CORE\cake\dispatcher.php, line 171
[main] - APP\webroot\index.php, line 83

Warning (2): Cannot modify header information - headers already sent
by (output started at D:\xampp\htdocs\ceramtest\www\cake\libs
\debugger.php:673) [CORE\cake\libs\controller\controller.php, line
746]
Code | Context

$status = "Location: http://localhost/ceramtest/www/"

header - [internal], line ??
Controller::header() - CORE\cake\libs\controller\controller.php, line
746
Controller::redirect() - CORE\cake\libs\controller\controller.php,
line 725
AuthComponent::startup() - CORE\cake\libs\controller\components
\auth.php, line 450
Component::triggerCallback() - CORE\cake\libs\controller
\component.php, line 186
Controller::startupProcess() - CORE\cake\libs\controller
\controller.php, line 527
Dispatcher::_invoke() - CORE\cake\dispatcher.php, line 187
Dispatcher::dispatch() - CORE\cake\dispatcher.php, line 171
[main] - APP\webroot\index.php, line 83

i am test with admin user,but i have error,and i cant underetand how
can i create permissions for
groups

can i read all permissions from database or i must create all
permissions link this
function initDB() {
$group =& $this->User->Group;
//Allow admins to everything
$group->id = 1;
$this->Acl->allow($group, 'controllers');

//allow managers to posts and widgets
$group->id = 2;
$this->Acl->deny($group, 'controllers');
$this->Acl->allow($group, 'controllers/Posts');
$this->Acl->allow($group, 'controllers/Widgets');

//allow users to only add and edit on posts and widgets
$group->id = 3;
$this->Acl->deny($group, 'controllers');
$this->Acl->allow($group, 'controllers/Posts/add');
$this->Acl->allow($group, 'controllers/Posts/edit');
$this->Acl->allow($group, 'controllers/Widgets/add');
$this->Acl->allow($group, 'controllers/Widgets/edit');
//we add an exit to avoid an ugly "missing views" error message
echo "all done";
exit;
}

where is my problem?

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