This is the enviroment

A WinForm application call a ServicedComponent, it is activated in Server Mode.
This ServicedComponent, throw a CustomException that is catched by de WinForm Application.

When the ServicedCompoent does not implement another Interface, the exception catched by
the application is CustomException, like I expected.
However when the ServicedCompoent does implement another Interfacem the exception catched by
the application is ApplicationException.

thanks for any help.

CODE

-- Custom Exception, Defined in another class library, ----

[Serializable]
public class CustomException : ApplicationException
{

 protected CustomException(SerializationInfo info,
StreamingContext context) : base(info, context) {}

 public CustomException() : base() {}

 public CustomException(string message) : base(message) {}

 public CustomException(string message,Exception inner) :
base(message, inner) {}
}


-- Class Library with ServicedComponent, Activation Mode :
Server---------------------------------

public interface IThrowExcepcion: IDisposable
{
 void ThrowCustomException(string Mensaje);
}

// In this way, works. But, if i implement
IThrowExcepcion, it does not work
public class ThrowExcepcion:
ServicedComponent //,IThrowExcepcion

{
 public ThrowExcepcion()  {}

 public void ThrowCustomException(string Mensaje)
 {
   throw new ION.Servicios.Excepciones.CustomExcepcion
(Mensaje);
 }
}


--- To show the case i useo the next code  

try
{
 using (Test.ThrowExcepcion Tester = new
(Test.ThrowExcepcion())
 {
   Tester.ThrowCustomException ("Prueba1");
 }
}
catch (CustomExcepcion E)
{
 // if i do not implement IThrowExcepcion, it execute
this code
 MessageBox.Show ("with IThrowExcepcion");
}
catch (ApplicationException E)
{
 // if i implement IThrowExcepcion, it execute this code