.net remoting and com

[Geoffrey]

Hello,

I have a server that publish remoting objects.
When I try to use these objects with my client, all is ok.

But now, I want to use one method of these object via COM.
So, I create a "wrapper".
But, with COM, I receive an error : "return argument has an invalid type"

My (simplified) code is at the end of this mail.
My server publish an object.
This object has a testmethod and an indexer that return another object. And
this other object has a test method.
Via COM, I receive the result of the first test method, but error with the
second object

Do you have any idea ?

Thx

// INTERFACE
namespace Dufour.InterfaceBascule
{
public interface IRemoteBascules
{
Dufour.InterfaceBascule.IRemoteBascule this[int index]
{
get;
}
int GetNbreBascule();
}

public interface IRemoteBascule
{
int Test();
}
}

// Objects

namespace Dufour.Bascules
{
[Serializable]
public class Bascules : MarshalByRefObject,
Dufour.InterfaceBascule.IRemoteBascules
{
private static Bascule[] m_bascules = new Bascule[5];
private int NbreBascule=5;
public Dufour.InterfaceBascule.IRemoteBascule this[int index]
{
get
{
if (m_bascules[index] == null)
{
m_bascules[index] = new Bascule(4);
}
return m_bascules[index];
}
}
public int GetNbreBascule()
{
return NbreBascule;
}
}

[Serializable]
public class Bascule :
MarshalByRefObject,Dufour.InterfaceBascule.IRemote Bascule
{
public int Test()
{
return 110;
}
}
}

//The SERVER . net remoting
....
TcpChannel channel = new TcpChannel(7000);
ChannelServices.RegisterChannel(channel,false);
RemotingConfiguration.RegisterWellKnownServiceType (typeof(Bascules),
"RemoteBascules", WellKnownObjectMode.Singleton);
.....

// The com object

namespace Dufour.Bascule
{
[InterfaceType(ComInterfaceType.InterfaceIsIDispatc h)]
public interface IAutomationBascules
{
int GetWeight(int Bascule);
}

[ClassInterface(ClassInterfaceType.None)]
public class AutomationBascules : IAutomationBascules
{
public int GetWeight(int Bascule)
{
Dufour.InterfaceBascule.IRemoteBascules b;
try
{
TcpChannel channel = new TcpChannel();
ChannelServices.RegisterChannel(channel, false);
b =
(Dufour.InterfaceBascule.IRemoteBascules)Activator .GetObject(typeof(Dufour.I
nterfaceBascule.IRemoteBascules), "tcp://localhost:7000/RemoteBascules");

return(b[1].Test()); // return b.GetNbreBascule is OK
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
return 0;
}

}

}
}