You see something like the following errors/warnings in the Message Logs of the CFA:

"MSSQL: warning: can't connect to explicitly configured 'MSSQL10.XXXX' server instance: Failed to connect to server XXXX\MSSQL10.XXXX"

You see the MSSQL10 (or 10_50, etc.) instance when you enumerate the SQL databases on the RVX Config tool on the server.
This is a false error message having to do with the SQL plugin searching for a database that does not exist.

On the RVX Config tool on the server, make sure this database is checked to be excluded.