Trying to connect to Microsoft SQL Server via JDBC

This is what I've got:
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
               con = DriverManager.getConnection(
                         "jdbc:microsoft:sqlserver://databasename:1433", "user", "pass");This is what I get:
java.lang.ClassNotFoundException: com.microsoft.jdbc.sqlserver.SQLServerDriverDoes anyone know what I'm doing wrong?

Well, you must have tested to make sure that the socket value is indeed the correct value. But with that error, and you are certain that the socket value is correct, then it becomes difficult.

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