I have a problem when i am creating user login authentication

Hi..Every one ,
i am using postgresql database for cake when i am creating the user
authentication its show errors,
hope u i wrote properly but it shows Error, i wrote code like this
please any one can help me out.

My Database Table Name "tbluser "
------------------------------------------

Columns | Type
| Modifiers
----------------+------------------------
+---------------------------------------------------------------------
lnguser | integer | not null default
nextval(('"tbluser_lnguser_seq"'::text)::regclass)
strfname | character varying(100) | not null
strlname | character varying(100) | not null
struid | character varying(100) | not null
strpid | character varying(100) | not null
lnguser_group | integer | not null
strtelarea | character varying(20) |
strtelno | character varying(20) |
stremail | character varying(100) |
struserconfirm | character varying(100) |
dtmregistered | date |
dtmapproved | date |
blnchatuser | bit(1) |
Indexes:
"tbluser_pkey" PRIMARY KEY, btree (lnguser)

------------------------------------------------------------------------------

Model : tbluser.php

class Tbluser extends AppModel {

var $useTable = 'tbluser';

}

----------------------------------------------

Controller:tblusers_controller.php

class TblusersController extends AppController {

var $name = "Tblusers";

function login() {

}

function index() {

}
function logout() {

$this->Session->setFlash('Logout');

$this->redirect($this->Auth->logout());
}
}

------------------------------------------------------
App Controller :app_controller.php

class AppController extends Controller {

var $uses=array('Tbluser');

var $components = array('Auth');

function beforeFilter(){
$this->Auth->loginRedirect = array('controller'=> 'tblusers',
'action' => 'index');
$this->Auth->logoutRedirect = array('controller'=> 'tblusers',
'action' => 'login');

$this->Auth->allow('login');

$this->Auth->authorize = 'controller';

$this->set('loggedIn', $this->Auth->Tbluser('lnguser')); //
Here I am getting the error
}

function isAuthorized() {
return true;
}
}

--------------------------------------------------------
viewfile : login.ctp

<?php echo $form->create('Tbluser',
array(
'action' => 'login'));
?>
<table border="0" cellspacing="0"
cellpadding="0">
<tr>
<td align="center"
valign="middle">USERNAME</td>
<td align="center" valign="middle"></
td>
<td align="center" valign="middle">
<?php
e($form->text('struid'));
?>
</td>
<td>&nbsp;</td>
</tr>
<tr>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
<tr>
<td align="center"
valign="middle">PASSWORD</td>
<td align="center" valign="middle"></
td>
<td align="center" valign="middle">
<?php
echo $form-
>password('strpid');
?>
</td>
<td>&nbsp;</td>
</tr>
<tr>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
<td>&nbsp;</td>
</tr>
</table>

<?php
echo $form-
>submit('signin.gif',array(
'onclick'
=> 'validate()'));

?>

<?php echo $form->end(); ?>

---------------------------------------------------------
Fatal error: Call to undefined method AuthComponent::tbluser() in /
home/narendra/wizard_mvc/app/app_controller.php

Please help me out.....! Thanks in advance

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