Convert An application based on Ria Services

Hi everybody,

I'm testing and learning Devforce. I have a small application with several modules developed in Ria Services under Prims Pattern.

in order to convert all application I'm converting one module at a time.

When i test a single  converted  module in a simple  SilverLight DevForce Application it runs well.

However when I try to run that same module within my prism infrastructure I get always errors related to "KnownTypes"

My question is: 

  Modules written in Ria Services Cannot coexist  with modules written in DevForce?

Example : my login Module in DevForce:

private void LoginCommand( object iView )

{

   LoginManager.ConnectAsync (op =>

           {

             ILoginCredential credential = new FormsAuthenticationLoginCredential(userName, Password, "demo", false);

           this.CurrentLoginOperation = LoginManager.LoginAsync(credential, LoginCompleted, null);

          });

        }

    private void LoginCompleted(IdeaBlade.EntityModel.LoginOperation args)

    {

        if (args.CompletedSuccessfully)

        {

        }

        else if (args.HasError)

        {

            //allways this error

     //"Type 'erp.Web.Services.MenuItem' cannot be added to list of known types since another type     'erp.Web.Services.MenuItem' with the same data contract name 'http://schemas.datacontract.org/2004/07/erp.Web.Services:MenuItem' is already present."     

        }

        else if (!args.Cancelled)

        {

        }

    }

'erp.Web.Services.MenuItem' –is a class in another module based in Ria Services

This has nothing to do with the Login module.

//-------------------

using System;

using System.Collections.Generic;

using System.ComponentModel.DataAnnotations;

using System.Data;

using System.Linq;

using System.Runtime.Serialization;

using System.ServiceModel.DomainServices.Hosting;

using System.ServiceModel.DomainServices.Server;

using System.Web;

using Eticadata.Platinum;

namespace erp.Web.Services

{

    [RequiresAuthentication]

    [EnableClientAccess()]

    public class NavigationStructureService : DomainService

    {

        [Query]

        public IQueryable<MenuItem> GetNavigationStructure()

        [Query]

        public IQueryable<moduledef> GetModulesToLoad()

    }

    public sealed partial class moduledef

    {

        [Key]

        public string modulename { get; set; }

        public string typename { get; set; }

    }

    public sealed partial class MenuItem

    {

        public MenuItem()

        {

            this.Region = "MainRegion";

            this.Items = new List<MenuItem>();

        }

        [Key]

        public string Key { get; set; }

        [DataMember]

        public string Text { get; set; }

        [DataMember]

        public string ModuleName { get; set; }

        [DataMember]

        public string ModuleType { get; set; }

        [DataMember]

        public bool IsSeparator { get; set; }

        [DataMember]

        public string ViewName { get; set; }

        [DataMember]

        public string Region { get; set; }

        [DataMember]

        [Include]

        [Association("Items", "Key", "ParentKey")]

        public List<MenuItem> Items { get; set; }

        [DataMember]

        public string ParentKey { get; set; }

    }

    public sealed partial class TabelasPesquisa

    {

        public TabelasPesquisa()

        {

            this.Items = new List<TabelasPesquisa>();

            this.ItemsLista = new List<ListaPesquisas>();

        }

        [Key]

        public string Key { get; set; }

        [DataMember]

        public string Text { get; set; }

        [DataMember]

        public string Command { get; set; }

        [DataMember]

        [Include]

        [Association("Items", "Key", "ParentKey")]

        public List<TabelasPesquisa> Items { get; set; }

        [DataMember]

        public string ParentKey { get; set; }

        [DataMember]

        public List<ListaPesquisas> ItemsLista { get; set; }

    }

    public sealed partial class ListaPesquisas

    {

        public ListaPesquisas()

        {

        }

        [DataMember]

        public Guid id { get; set; }

        [DataMember]

        public string CommandName { get; set; }

        [DataMember]

        public string Nome { get; set; }

        [DataMember]

        public bool PorDefeito { get; set; }

        [DataMember]

        public bool ListaPersonalizada { get; set; }

    }

}