why did't cast the object to TestHome type?

hi.
I have written a Session EJB by jbuilder7.0 and deloyed it into the weblogic6.1.but when I test the EJB at client,the test program throwed a error,how can I do it?
the source:
import java.util.*;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;

public class testejb
{
public static void main(String args[])
{
try
{
Properties p=System.getProperties();

p.setProperty(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
p.setProperty(Context.PROVIDER_URL,"t3://127.0.0.1:7001");

Context ctx=new InitialContext(p);
Object ref=ctx.lookup("TestBean");
TestHome data=(TestHome) PortableRemoteObject.narrow(ref, TestHome.class);

if(data instanceof TestHome)
{
System.out.println("yes.");
}else{
System.out.println("no.");
}

}catch(Exception ex){
ex.printStackTrace();
}

}
}
error:
E:\java>java testejb
java.lang.ClassCastException
at com.sun.corba.se.internal.javax.rmi.PortableRemoteObject.narrow(Unkno
wn Source)
at javax.rmi.PortableRemoteObject.narrow(Unknown Source)
at testejb.main(testejb.java:20)

What Interface does TestHome implement ?

"gagagohst",
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Thanks in advance,

Simon, Bartender "J2EE and EJB" forum

Did you try to write out the result of the lookup? (ref) Isn't it null?
What is the JNDI name of the bean (TestHome)?
Ban

I meant of course TestBean instead of TestHome!
Cheers,
Ban