[CentOS] Bacula

Dear all,
I get a message from root as follows;

09-Feb 11:26 bacula-dir JobId 0: Fatal error: Could not open Catalog
"MyCatalog", database "bacula".
09-Feb 11:26 bacula-dir JobId 0: Fatal error: postgresql.c:227 Unable
to connect to PostgreSQL server. Database=bacula User=bacula
Possible causes: SQL server not running; password incorrect;
max_connections exceeded.
09-Feb 11:26 bacula-dir ERROR TERMINATION
Please correct configuration file: /etc/bacula/bacula-dir.conf

Does anyone know how to check if the database for bacula exists and
how to start it?

I would like to know how to view tape archives?

Thank you if anyone can help.

John.