Why PortableRemoteObject.narrow causes ClassCastException ?

Issue

• While doing migration from Websphere to JBoss EAP 6.3 we get ClassCastException. Below is the code snippet regarding EJB (stateless bean) class to invoking initialize() Which is purely from WAS environment. So I have migrate to JBOSS compatible.

    import javax.naming.InitialContext;
        import javax.rmi.PortableRemoteObject;
    //Sample code for TestCaller.java
    BusinessServerHome BusinessServerHome =   (BusinessServerHome)PortableRemoteObject.narrow(getJNDIContext().lookup(BusinessServerHomeName), BusinessServerHome.class);  
    BusinessServer BusinessServer = BusinessServerHome.create();
    BusinessServer.initialize();

• In brief explanation below are the description of the interfaces and classes used in the above code snippet. Please let me know if you need more information from me.
  BusinessServerHomeName -> This is the JNDI EJB JNDI name string
  BusinessServerHome -> This is the home interface
  initialize() -> This is the bean class method, here we have some business logic.

• The following exception is received while execution of the above code:

    java.lang.ClassCastException
    at org.jboss.com.sun.corba.se.impl.javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:246)
    at javax.rmi.PortableRemoteObject.narrow(PortableRemoteObject.java:158)
    at com.example.TestCaller.getSessionManager(TestCaller.java:290)