Warning: pg_connect() [function.pg-connect]: Unable to connect to PostgreSQL server: FATAL: password authentication failed for user "drupal" in /usr/share/drupal/includes/database.pgsql.inc on line 28

Warning: pg_last_error() [function.pg-last-error]: No PostgreSQL link opened yet in /usr/share/drupal/includes/database.pgsql.inc on line 28