Hi
A recent database upgrade from MS SQL2005 to 2012 has caused ( I believe) the
following error to occur intermittently ( about 10 times today):
Macromedia][SQLServer JDBC Driver][Macromedia][SQLServer JDBC Driver]The
requested instance is either invalid or not running.
I would probably start by updating the Data Direct drivers to the latest
version you can get for 6.1.
I found this (v 3.5):
http://helpx.adobe.com/coldfusion/kb/updated-datadirect-jdbc-drivers-version-1.html
--- there might be newer ones though, not sure.
If that doesn't help, you could try