> Connection con = DriverManager.getConnection( url, info );
> con.setAutoCommit( false );

In this case you have to correct your code. You cannot close
connection that is not in auto-commit mode without _explicitly_
calling commit() or rollback(). But I will check your test case too,
why does it fail. I suspect that this is because you use BLOBs (even
SUB_TYPE 1).

Thanks!
Roman