Urgent..how to connect jmatlink & jdeveloper 10

hi:
i am trying to connect jmatlink & jdeveloper 10g
my codes are below:
import jmatlink.*;
public class test {
public static void main(String[] args) {
// create instance of engine
JMatLink engine = new JMatLink();
// open engine and start MATLAB
engine.engOpen();
// test string: create array of random numbers
String testCommand = "a=rand(4)";
engine.engEvalString(testCommand);
// terminate MATLAB and close engine
engine.engClose();
I got the error message:
Project: C:\jdev10\jdev\mywork\Application1\Project1\Project1.jpr
C:\jdev10\jdev\mywork\Application1\Project1\src\test\test.java
Error: class format error: JMatLink.class on classpath C:\jdev10\jdev\mywork\Application1\Project1\classes\JMatLink.class
Error(2,8): jmatlink not found
I also put jmatlink.class in C:\jdev10\jdev\mywork\Application1\Project1\classes\JMatLink.class.
I have no idea what is wrong!
Any help will be appreciated!!

Try posting your question to a Java forum, because this one is about native development. For example, you can use http://forum.java.sun.com/forum.jspa?forumID=31

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