Piwigo encountered a non recoverable error

[mysql error 1044] Access denied for user 'dreens_1'@'localhost' to database 'dreens_photos'
Connection to server succeed, but it was impossible to connect to database

#1	my_error /home/dreens/public_html/photos/include/common.inc.php(113)
#2	include_once /home/dreens/public_html/photos/picture.php(10)