Session Beans?

[ray]

Can u tell me why code like the following in a Session Bean throws a UnmarshalException.   public Enumeration getItems ( ) throws RemotException {     Vector items = new Vector ( );     return items.elements ( ); }   with the definition in the remote interface   Enumeration getItems ( ) throws RemoteException;   The error tells me that Vector is not serializable.   But if instead of allocating the vector in the Session Bean, I call anEntity Bean finder method that allocates the vector the same way it does not fault.   Thanks in Advance