problems at 1.3.2 Implementing CRUD Operations with winxp

I create the database with the User table and configure the config/main.php file with the connectionString like the yii guide say, adding the line:

'db'=>array(

'connectionString'=>'sqlite:protected/data/source.db',

),

then when i try to run in console this commands:

% cd c:\xampp\htdocs\testdrive

and just when i put this command:

%  …\yii\framework\yiic shell

then show me this error:

"<h2>

            Welcome,

Fatal error: session_start(): Failed to initialize storage module: user (path: c:\xampp\tmp) in c:\xampp\htdocs\yii\framework\web\CHttpSession.php on line 102"

please can anybody help me?

what i'm doing wrong?

The program is trying to open session which uses directory c:\xampp\tmp as session storage. Make sure this directory exists and is writable by the Web server process.