next() error

I am using postgresql 8 and the 8 JDBC 3 driver.
I get the next error:

javax.servlet.ServletException: ResultSet not positioned properly,
perhaps you need to call next.

This code used to work on postgresql 7.4.6 and 215 JDBC 3 driver 
Has changed something on the server or on the driver?

Thanks for your help.

This is the code on a jsp page:
-------------------------------------------------------------------------------------
<%@ page contentType="text/html; charset=iso-8859-1" language="java"
import="java.sql.*" errorPage="" %>
<%@ include file="Connections/connPubs.jsp" %>

<%
String RecordsetPubs1 = "1";
if (request.getParameter("au_id") != null) 
{
	RecordsetPubs1 = (String)request.getParameter("au_id");
}
%>

<%
Driver DriverRecordsetPubs1 =
(Driver)Class.forName(connPubs_DRIVER).newInstance();
Connection ConnRecordsetPubs1 =
DriverManager.getConnection(connPubs_STRING,connPubs_USERNAME,connPubs_PASSWORD);
PreparedStatement StatementRecordsetPubs1 =
ConnRecordsetPubs1.prepareStatement("SELECT * FROM public.authors
WHERE au_id = " + RecordsetPubs1 + "");
ResultSet RecordsetPubs1 = StatementRecordsetPubs1.executeQuery();
boolean RecordsetPubs1_isEmpty = ! RecordsetPubs1.next();
boolean RecordsetPubs1_hasData = ! RecordsetPubs1_isEmpty;
Object RecordsetPubs1_data;
int RecordsetPubs1_numRows = 0;
%>




Untitled Document




  

  

    
au_id
    
<%=(((RecordsetPubs1_data =
RecordsetPubs1.getObject("au_id"))==null ||
RecordsetPubs1.wasNull())?"":RecordsetPubs1_data)%>
  
  

    
au_lname
    
<%=(((RecordsetPubs1_data =
RecordsetPubs1.getObject("au_lname"))==null ||
RecordsetPubs1.wasNull())?"":RecordsetPubs1_data)%>
  
  

    
au_fname
    
<%=(((RecordsetPubs1_data =
RecordsetPubs1.getObject("au_fname"))==null ||
RecordsetPubs1.wasNull())?"":RecordsetPubs1_data)%>
  
  

    
phone
    
<%=(((RecordsetPubs1_data =
RecordsetPubs1.getObject("phone"))==null ||
RecordsetPubs1.wasNull())?"":RecordsetPubs1_data)%>
  
  

    
address
    
<%=(((RecordsetPubs1_data =
RecordsetPubs1.getObject("address"))==null ||
RecordsetPubs1.wasNull())?"":RecordsetPubs1_data)%>
  
  

    
city
    
<%=(((RecordsetPubs1_data =
RecordsetPubs1.getObject("city"))==null ||
RecordsetPubs1.wasNull())?"":RecordsetPubs1_data)%>
  
  

    
state
    
<%=(((RecordsetPubs1_data =
RecordsetPubs1.getObject("state"))==null ||
RecordsetPubs1.wasNull())?"":RecordsetPubs1_data)%>
  
  

    
zip
    
<%=(((RecordsetPubs1_data =
RecordsetPubs1.getObject("zip"))==null ||
RecordsetPubs1.wasNull())?"":RecordsetPubs1_data)%>
  
  



<%
RecordsetPubs1.close();
StatementRecordsetPubs1.close();
ConnRecordsetPubs1.close();
%>
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-- 
Nahum Castro González
León, Guanajuato, México