Error : Connect failed: Access denied for user 'promisspain'@'localhost' (using password: YES)

FileName : /var/www/vhosts/promisspain.com/httpdocs/includes/php/classes/core/core.database.class.php(1) : eval()'d code (68)

Stack Trace: 
Core_Database->__construct() : Filename /var/www/vhosts/promisspain.com/httpdocs/includes/php/config.php - Line88
dbConnect() : Filename /var/www/vhosts/promisspain.com/httpdocs/professionals.php - Line7