After installing eZ Publish 4.7 I followed the document in doc.ez.no (http://doc.ez.no/eZ-Publish/Upgrading/Upgrading-to-5.0/Upgrading-from-4.7-to-5.0) and (install.md) to upgrade to eZ Publish 5.0 however I keep getting the following error in var/log/error.log

"
[ Nov 02 2012 16:27:08 ] [192.168.2.204] eZMySQLiDB:
Connection error: Couldn't select the database. Please try again later or inform the system administrator.
Access denied for user ''@'localhost' to database 'none'
"

I've copied ezpublish.yml.example to ezpublish.yml and updated the fields to match my configuration.