My b2evolution Version: Not Entered

I installed b2evolution on my hosting service hostdepartment.com and am getting the following error:

MySQL error!

Error establishing a database connection!

(Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2))

1. Are you sure you have typed the correct user/password?
2. Are you sure that you have typed the correct hostname?
3. Are you sure that the database server is running?

The installation created an installation automatically cciustn_blog but not sure where to check password setup within b2. Any help on this appreciated