Trying to work with MS SQL I get the error "JRE (Java Runtime Environment) version 1.7 is not supported by this driver. use classlibrary sqljdbc4.jar witch supports JDBC 4.0".

This is usually caused by having 'sqljdbc' and 'sqljdbc4.jar' in your CLASSPATH or the %ISCOBOL%/lib directory.

You only need the sqljdbc4.jar. You should delete the sqljdbc.jar.

Here is a link to Microsoft's documentation that explains the difference between using the sqljdbc.jar and sqljdbc4.jar: http://technet.microsoft.com/en-us/library/ms378422.aspx