JSP SQL Error

Hi While trying to execute the below code i'm getting the following error "java.sql.SQLException: Io exception: Got minus one from a read call ". please help me out.

<%
try{
String Username=request.getParameter("username");
String Password=request.getParameter("password");
session.setAttribute("myusername", Username);
 Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
    Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:8084:dsn","system","tiger");  
           Statement st=null;
           PreparedStatement ps=null;
           ps=con.prepareStatement("select * from Users where USERID=? and PASSWORD=?");
           ps.setString(0, Username);
           ps.setString(1, Password);
           ResultSet rs=null;
           rs=ps.executeQuery();
           if(rs.next()){

                String redirectURL= "New.html";
                response.sendRedirect(redirectURL);

        }
                     else{
               out.println("no login");

                     }
                     }
    catch(Exception e){
    out.println(e);
}
%>