JDBC Connection code to connect servlet with SQL Server 2008

Please ans me why it is not connect i use netbeans IDE7.0 Jdk 1.7 i also add sqljdbc4.jar but the output is SEVERE: Java Runtime Environment (JRE) version 1.6 is not supported by this driver. Use the sqljdbc4.jar class library, which provides support for JDBC 4.0. i try Avery thing but i m not success so please ans me .
My connection code is

static Connection con; static Statement st; static PreparedStatement ps; static final String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; static final String url = "jdbc:sqlserver://localhost=127.0.0.1:1433;databaseName=JSPPROJECT;selectMethod=cursor"; //localhost=127.0.0.1 //static String url ="jdbc.mssql:192.168.1.99:8080/Test"; static String userName ="sa"; static String password ="1309";

public MyDBConnection1() {
}


public static void getConnection(String InvoiceNo , String FirstName, String LastName, String CourseName, String BatchTime)
{
    try {
        try {
            Class.forName(driver);
        } 
        catch (ClassNotFoundException ex) 
        {
            ex.printStackTrace();
        }
        con = DriverManager.getConnection(url,userName,password);
        System.out.println("---connection establised ------"+con.toString());
        st=con.createStatement();
        String query = " insert into StudentDetails(InvoiceNo,FirstName,LastName,CourseName,BatchTime) values (InvoiceNo,FirstName,LastName,CourseName,BatchTime) ";
        //String query = " insert into StudentDetails(InvoiceNo,FirstName,LastName,CourseName,BatchTime) values (ivno,fname,lname,cname,btime) ";

        //ps = con.prepareStatement("insert into StudentInfo(studentId,studentName,studentAddress) values (?,?,?) ");
        //ps.setString(1, studentId);

        int record = st.executeUpdate(query);
        System.out.println(" Inserted Records :"+record);

    } 
    catch (SQLException ex) 
    {
        ex.printStackTrace();
    }
    finally 
    {
        try 
        {
            if(con!=null)
            {
                con.close();
            }
        }
        catch (SQLException ex) 
        {
            ex.printStackTrace();
        }
    }
}

public static void main(String args[])
{
    getConnection(driver, userName, userName, userName, userName);
}

}