bekomme seit gestern abend folgende Meldung an gezeigt.

Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: Access denied for user 'www-data'@'localhost' (using password: NO) in /var/www/web123/html/lib/functions.lib.php on line 39

Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: A link to the server could not be established in /var/www/web123/html/lib/functions.lib.php on line 39

Warning: mysql_query() [function.mysql-query]: Access denied for user 'www-data'@'localhost' (using password: NO) in /var/www/web123/html/lib/functions.lib.php on line 43

Warning: mysql_query() [function.mysql-query]: A link to the server could not be established in /var/www/web123/html/lib/functions.lib.php on line 43

brauche dringend hilfe.

Danke schön