some Spark Plug plugin problem

i have cakephp 1.3.4
i have this error:

Fatal error: Uncaught exception 'Exception' with message
'User::authsomeLogin() is not implemented!' in D:\xampp\htdocs\ird\www
\app\plugins\spark_plug\controllers\components\authsome.php:81 Stack
trace: #0 D:\xampp\htdocs\ird\www\app\plugins\spark_plug\controllers
\components\authsome.php(196): AuthsomeComponent->login('guest') #1 D:
\xampp\htdocs\ird\www\app\plugins\spark_plug\controllers\components
\authsome.php(148): AuthsomeComponent->__useGuestAccount() #2 D:\xampp
\htdocs\ird\www\app\plugins\spark_plug\controllers\components
\authsome.php(60): AuthsomeComponent->__getActiveUser() #3 D:\xampp
\htdocs\ird\www\app\plugins\spark_plug\config\config.php(71):
AuthsomeComponent->get() #4 D:\xampp\htdocs\ird\www\app
\app_controller.php(19): SparkPlugIt(Object(SearchController)) #5 D:
\xampp\htdocs\ird\www\cake\libs\controller\controller.php(526):
AppController->beforeFilter() #6 D:\xampp\htdocs\ird\www\cake
\dispatcher.php(187): Controller->startupProcess() #7 D:\xampp\htdocs
\ird\www\cake\dispatcher.php(171): Dispatcher->_invoke(Obje in D:\xampp
\htdocs\ird\www\app\plugins\spark_plug\controllers\components
\authsome.php on line 81

why?

when i am create some permation for guest

some info example:

in SearchController i have:

var $uses = array('Usercat', 'Subcat', 'Cat', 'Ostan',
'Shahr','User','UserGroup');

function index() {
.
.
.

}
when i use this controller when user login,i can see page,but guest
user i have error

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