Inside my application.ini file with my global settings, I provide the following lines to get my MySql database to connect:
resources.db.adapter = PDO_MYSQL
resources.db.params.host = localhost
resources.db.params.username = [DATABASENAME]_[uSERNAME]
resources.db.params.password = [PASSWORD]
resources.db.params.dbname = [DATABASENAME]_[DATABASENAME]
It's works great for me - hope that helps someone else out there!
Cheers:D