Error with ExecuteQuery() in prepared statement

Hello,
i' m a new one at java. I' m trying to build a web application in jsp and i have a problem in a simple at log in authentication.
My code is this:
<html>
<head>
<title>Welcome to the online Boat Shop, Inc.</title></head>
<body>
<%@ page language ="java" import = "java.io.*, java.lang.*, java.sql.*" %>
<% try
String strUsername = request.getParameter("USERNAME");
String strPassword = request.getParameter("PASSWORD");
Class.forName ("org.apache.derby.jdbc.ClientDriver");
Connection myConn = DriverManager.getConnection("jdbc:derby://localhost:1527/boatsdb","tony", "logo");
String strSQL = "SELECT USERNAME, PASSWORD FROM BOATDB where USERNAME = ? and PASSWORD = ?";
PreparedStatement stmt = myConn.prepareStatement(strSQL);
stmt.setString(1, "USERNAME");
stmt.setString(2, "PASSWORD");
ResultSet myResult = stmt.executeQuery(strSQL);
if(myResult.next()){
out.println("Login Succesful! A record with the given user name and password exists");
} else {
out.println("Login Failed. No records exists with the given user name and password");
myResult.close();
stmt.close();
myConn.close();
} catch(Exception e){
out.println(e);
%>
</body>
</html>
The problem is that prepared statement doesn't support executeQuery() method and i can find any solution. The error is this:
java.sql.SQLException: Method 'executeQuery(String)' not allowed on prepared statement. I already have some data in my database so that it can return results.
Thank you.
Edited by: antonis on May 3, 2008 6:13 AM

thank you, that was the problem. It seems that i have also done mistakes in passing the username and password from the forms to the database for checking, because the message that i get always when i log is that there is no user with this username kai password.
<form method=GET action=log1.jsp>
<font size=5> Username <input type=text name="USERNAME" size=20>
          </font>
          <br>
          <font size=5> Password <input type=text name="PASSWORD" size=20>
          </font>
          <br>
          <input type=submit name=action value="Submit">
</form>
That's the forms and combined with the code in the fist post should have worked. Any ideas?
thanks again.

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***Annie***

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String sqlSele = "SELECT * FROM EMPLOYEE WHERE EMPNAME like ?" ;
PreparedStatement sts = con.prepareStatement(sqlSele);
sts.setString(1, "DEMO" );
ResultSet rs = sts.executeQuery();
while(rs.next())
System.out.println("driverConn.main()" + rs.toString());
catch(Exception e)
System.out.println(e);
e.printStackTrace();
Can someone help me out from this issue.

This is the program that I used for testing the behaviour of prepared statement with sqljdbc4.jar. Also included the code for Merlia.jar.
import java.sql.*;
public class driverConn {
     public static void main(String [] a)
          try{
          Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
          //Class.forName("com.inet.tds.TdsDriver");
          Connection con = DriverManager.getConnection("jdbc:sqlserver://SERVER23:5000;databaseName=TESTDB", "SYSADM", "SYSADM");
          //Connection con = DriverManager.getConnection("jdbc:inetdae7a:SERVER23:5000?database=TESTDB", "SYSADM", "SYSADM");
          String sqlSele = "SELECT * FROM EMPLOYEE WHERE EMPNAME like ?" ;
          //String sqlSele = "SELECT * FROM EMPLOYEE WHERE EMPNAME like ‘%DEMO%’”;
          PreparedStatement sts = con.prepareStatement(sqlSele);
          sts.setString(1, "DEMO" );
          //sts.setString(1, "%DEMO%" );
          java.sql.ResultSet rs = sts.executeQuery();
          while(rs.next())
               System.out.println("EMPNAME is " + rs.getString(“EMPNAME”) + “”);                    }
          catch(Exception e)
               System.out.println(e);
               e.printStackTrace();
Following are the specifications:
Version of the Driver:
Microsoft JDBC Driver 4.0 for SQL Server CTP3
Downloaded the driver using the link http://www.microsoft.com/download/en/details.aspx?id=11774
Java Version:
Java 1.7.0_02
Database Version:
Microsoft SQL Server 2008 (SP2) - 10.0.4000.0 (X64)

Error with ExecuteQuery() in prepared statement

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