yii-user-management

During the installation Yii-user-management, it fails as follows:

CDbCommand failed to execute the SQL statement: SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute… The SQL statement executed was: CREATE TABLE IF NOT EXISTS user_group (

id int(11) NOT NULL AUTO_INCREMENT,

owner_id int(11) NOT NULL,

participants text NULL,

title varchar(255) NOT NULL,

description text NOT NULL,

PRIMARY KEY (id)

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

I can not fix this, i just help. Thank very much