CDbException message

when I upload my files from localhost to the online server, then I get the following cdbexception message when I try to login using admin/admin values for user and password:

CDbException

CDbConnection failed to open the DB connection: SQLSTATE[28000] [1045] Access denied for user ‘root’@‘localhost’ (using password: YES)

/home/userid/public_html/d/webroot-directory/yii/framework/db/CDbConnection.php(364)

throw new CDbException(Yii::t(‘yii’,‘CDbConnection.connectionString cannot be empty.’));

353 try

354 {

355 Yii::trace(‘Opening DB connection’,‘system.db.CDbConnection’);

356 $this->_pdo=$this->createPdoInstance();

357 $this->initConnection($this->_pdo);

358 $this->_active=true;

359 }

360 catch(PDOException $e)

361 {

362 if(YII_DEBUG)

363 {

364 throw new CDbException(Yii::t(‘yii’,‘CDbConnection failed to open the DB connection: {error}’,

365 array(’{error}’=>$e->getMessage())),(int)$e->getCode(),$e->errorInfo);

366 }

367 else

368 {

369 Yii::log($e->getMessage(),CLogger::LEVEL_ERROR,‘exception.CDbException’);

370 throw new CDbException(Yii::t(‘yii’,‘CDbConnection failed to open the DB connection.’),(int)$e->getCode(),$e->errorInfo);

371 }

372 }

373 }

374 }

375

376 /**

what could be the reason.It works fine on localhost.

You are using the wrong database information. Check hostname, username and password in your Yii config. You probably got this info when you signed up for the hosting.