Problems faced when installing BOE XI 3.0

I am facing some problems when installing BOE XI 3.0 in server (Windows Server 2003): Scenario as below:

• (1) New install with existing CMS database*

- Created a CMS (BOEXIR3) and Audit (BOEXIR3_Audit) database in SQL 2005

- Created system ODBC DSN for CMS and AUDIT Database

- Keyed in with related database info in SQL Server Logon screen

- After clicked Next, prompted with an error message:

Fail to validate the database information

CMS database error: STU000226, Auditing database error: STU000225

BusinessObjects Enterprise CMS: Unable to connect to the CMS system and audit database "CMS", "AUDIT".

Reason: (Microsoft)[ODBC Driver Manager] Data source name not found and no default driver specified. Failure to validate the database credential has a potential to crash the database at a later stage. Enter the correct information.

Q: The respective Data Sources are created and tested OK with ODBC DSN, why prompted with this error message?

• (2) New install with MySQL database*

- Let the server to install with the default option u2013 MySQL database Server overnight

- The next day morning, installation fail, and we uninstalled / rolling back

- The roll back action completed successfully

- Reinstalled the BOE XI 3.0 with MySQL database

- However, the option to install with MySQL database is DISABLED.

Q: Why the option been disabled and is there any way to ENABLE back the option - to install with MySQL?

Would much appreciate advice on how to solve above problems.