Access to ejb after deserializing ejb hanlder

Hi,
I use oc4j (version 9.0.3.0.0).
The problem is that I serialize handler of the stateful session bean
in the servlet and pass it to the applet as string. In the applet
(different JVM than web container) I deserialize the handler. Using
this handler I try to access to the ejb and I get error:
javax.naming.NamingException: Lookup error:
javax.naming.AuthenticationException: Invalid username/password for
epssession (); nested exception is:
javax.naming.AuthenticationException: Invalid username/password for
epssession ()

When I lookup the ejb from the applet then it works fine.
Anyhow, handler in the applet is ok. Why I can not use the same
handler in the different virutal machine? Is this problem of the
configuration of the container? Please help!
Hannes