Multi-DB db.php file access denied

Hi, it shows this error when i use the db.php inside wp-content, if i rename it to db_.php it renders the main network website fine.

I dont know what im doing wrong, i have used the move-blogs.php file which has copied the tables to the global database.
Then i have refresh and i see the greens and then i went to the main website address to check and show this error:

Warning: mysql_get_server_info(): Access denied for user 'webbadm'@'localhost' (using password: NO) in /home/webbadm/public_html/wp-content/db.php on line 705

Warning: mysql_get_server_info(): A link to the server could not be established in /home/webbadm/public_html/wp-content/db.php on line 705

Warning: Cannot modify header information - headers already sent by (output started at /home/webbadm/public_html/wp-content/db.php:705) in /home/webbadm/public_html/wp-includes/functions.php on line 2772
Error establishing a database connection