Error database

Hi,

Apparently there is no user in your DB. This is the only possible option. To confirm that (if you do not trust your code), take the SQL constructed by CI Query Builder and execute it directly in the DB (using command line mysql, or using PHPMyAdmin or similar tool) to visualize the result:

SELECT * FROM usuarios WHERE login=$login AND senha = $senha LIMIT 1

Obvioudly you have to know values for $senha and $login.