UltraDev 4 & Tomcat on AS/400: Cursor Position Not Valid

[me...@storycounty.com]

I am having some problems with my web application using IBM's new HTTP 
Server with ASFTomcat.
I have written an application in UltraDev to search at DB for records 
corresponding to a registration number.

It works like greased lightning when there is actually a record in the 
recordset, but the application pukes
and gives me an error when I tried to query for a numbe that does not 
exist, and gives me a "Error 500:
cursor position invalid."

I know that this is a problem with the record set:  Here is the code:

<%@page contentType="text/html; charset=iso-8859-1" language="java" 
import="java.sql.*"%>
<%@ include file="Connections/connAS400.jsp" %>
<%
String rsBoaties__MMColParam = "%";
if (request.getParameter("BoatNumber")  !=null) {rsBoaties__MMColParam = 
(String)request.getParameter("BoatNumber") ;}
%>
<%
Driver DriverrsBoaties = 
(Driver)Class.forName(MM_connAS400_DRIVER).newInstance();
Connection ConnrsBoaties = 
DriverManager.getConnection(MM_connAS400_STRING,MM_connAS400_USERNAME,MM_connAS400_PASSWORD);
PreparedStatement StatementrsBoaties = 
ConnrsBoaties.prepareStatement("SELECT REGNUM, CITY  FROM BOATLIB.BTFPAA 
WHERE REGNUM LIKE UPPER('%" + rsBoaties__MMColParam + "%')");
ResultSet rsBoaties = StatementrsBoaties.executeQuery();
boolean rsBoaties_isEmpty = !rsBoaties.next();
boolean rsBoaties_hasData = !rsBoaties_isEmpty;
Object rsBoaties_data;
int rsBoaties_numRows = 0;
%>

Any ideas?  It would be greatly appreciated.  I am stumped.