Have you verified that the assets are indexed into IDOL? Collections results are returned from IDOL, not the database repository.
You can ignore the "Driver not capable" message in DB.log.
Make sure the IDOL configuration file has the SetIndexFields section set properly. Is this 7.2.2 version? Because RIA client is available till v7.2.2. And this version comes with OEM IDOL. It's not possible to chek the GetStatus of IDOL directly as it does not allow unencrypted commands.
IDOL logs should provide some info on this issue.