Does the jTds 1.3.1 driver work with both JDK 1.6 and JDK 1.7? Or do I need to use jTds 1.2.7 for JDK 1.6 and jTds 1.3.1 for JDK 1.7?
1.3.1 does not guarantee backwards compatibility. From my experience there are certain JTDS incompatibility issues on specific versions of windows.
https://sourceforge.net/p/jtds/news/2012/10/jtds-jdbc-driver-127-and-130-released/