Urgent! I need help on a Java project for school! Can you fix this code?

I am working on a project for my AP Java (Computer Science A) class and I need your help! I am trying to post data to a html form from a particular website:

http://www.upcdatabase.com/itemform.asp

The Java code I wrote kind of sort of works, but returns the website source code that doesn't contain the results of the query!

If I manually type in the following UPC code to the form: 075992584425

It will return: Description: Madonna - Like A Prayer

Size/Weight: CD ... and a bunch of other corresponding data.

The Java Class code that I wrote for this:

// BEGIN CODE HERE --------------------------------------------------------------------------------

import java.net.*;

import java.io.*;

public class ReadWriteURL {

public void PostToForm() {

try

{

//Create Post String

String data = URLEncoder.encode("075992584425", "UTF-8");

System.out.println("data= " + data);

System.out.println();

// Send Data To Page

URL url = new URL("http://www.upcdatabase.com/itemform.asp?%22);

URLConnection conn = url.openConnection();

conn.setDoOutput(true);

OutputStreamWriter wr = new

OutputStreamWriter(conn.getOutputStream());

wr.write(data);

wr.flush();

// Get The Response

BufferedReader rd = new BufferedReader(new

InputStreamReader(conn.getInputStream()));

String line;

while ((line = rd.readLine()) != null) {

System.out.println(line);

//you Can Break The String Down Here

}

}

catch (Exception e) {

System.out.println(" There was an error");

}

}

}

// END CODE ----------------------------------------------------------------------------------------------

Can you quickly fix this code so that it retrieves the correct data, for the search value? (Same data like entering by hand)

I cannot figure out from the source code of the HTML page what to send or how to find out what the exact URL is to send it to.