The fact that you have sqljdbc.jar
and sqljdbc4.jar
indicates that you are using the Microsoft SQL Server JDBC Driver, but the connection string is for the jTDS driver. Make sure you use the correct connection string for the Microsoft SQL Server JDBC or that you use the jTDS JDBC driver instead.
Second: you should use either sqljdbc.jar
(which is for Java 5) or sqljdbc4.jar
(which is for Java 6 and later), not both; loading both might lead to unexpected behavior due to classloading order etc!