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