Help!! Objects with Vectors

Hello. I've a problem with ksoap vectors: I can send and recive vectors but
when I try to send an object that it has an 
vector like attribute of this object in the server side I get the object
well. However the vector's values are null.
What can I do? I've tried it a lot of diferents ways but I couldn't make
that the program working.

I'm using ksoap like client and Apache Soap 3.2.4 like server. Thanks

My code:
    HttpTransport transport;
    SoapObject request;
    ClassMap classMap;
    
    ...     
    request = new SoapObject(this.serviceNamespace,"Alta");
    classMap =new ClassMap();                                            
    classMap.addMapping(this.serviceNamespace,"Contacto",this.contacto
getClass());
    transport =new HttpTransport(serviceUrl, "AgendaService#Alta");
    transport.setClassMap(classMap);
    transport.debug=true;
    request.addProperty("Contacto",this.contacto);
               
    int nuevoId= ((Integer)transport.call(request)).intValue();             
 
    ...

type contacto:

  int id;
  String alias;  
  String nombre;
  String apellidos;
  int numTlf;
  Vector tipoTelefono;      
  Vector telefonos;            
  String email;
  String direccion;
  String codigoPostal;
  String poblacion;
  String provincia;
  String notas;