Beginner Trying To Figure Out Useridentity

Alright so I have begun using yii and completed the blog tutorial and am now trying a very simple website on my own. Unfortunately I have run into a issue with the userIdentity I created a model for a User which holds things like username, passwordhash, passwordsalt, attempted tries etc. I keep getting parsing errors on

$user->tries = $user->tries + 1;
$user->save();

on failed logins. I am not sure how I should be able to do this...Any suggestions? Below is my UserIdentity

<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	 private $_id;
	public function authenticate()
	{
		$user=User::model()->findByAttributes(array('name'=>$this->username));
		if ($user === null)
			$this->errorCode=self::ERROR_USERNAME_INVALID;
		else if ($user->passwordHash!==hash('sha512',$this->password . $user->passwordSalt)){
		  $user->tries = $user->tries + 1;
		  $user->save();
      $this->errorCode=self::ERROR_PASSWORD_INVALID;
		}
		else if ($user->tries >= 3)
			$this->errorCode=self::ERROR_STATUS_LOCKED;
		else {
			$this ->_id=$user->Id;
			$this ->setState('title',$user->title);
			$this ->errorCode=self::ERROR_NONE;
			/*$auth = Yii::app()->authManager;
			if(!$auth->isAssigned($user->role, $this->_id))
			{
				if($auth->assign($user->role, $this->_id))
				{
					Yii::app()->authManager->save();
				}
			}*/
		}
		
		return !$this->errorCode;
	}
	
	public function getId()
	{
		return $this-> _id;
	}
}