Vista - Error An existing connection was forcibly closed by the remote hos

Hi misters,

I have asp.net 2.0 application, and services WCF. When I call method of
service, its appears this error:

[SocketException (0x2746): An existing connection was forcibly closed by the
remote host]
System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32
size, SocketFlags socketFlags) +1017867
System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32
size) +119

[IOException: Unable to read data from the transport connection: An existing
connection was forcibly closed by the remote host.]
System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32
size) +267
System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size) +21
System.Net.Connection.SyncRead(HttpWebRequest request, Boolean
userRetrievedStream, Boolean probeRead) +301

[WebException: The underlying connection was closed: An unexpected error
occurred on a receive.]
System.Net.HttpWebRequest.GetResponse() +1501867
System.ServiceModel.Channels.HttpChannelRequest.WaitForReply(TimeSpan
timeout) +40

[CommunicationException: An error occurred while receiving the HTTP response
to http://localhost:2121/TINSA.Tareas/service.svc. This could be due to the
service endpoint binding not using the HTTP protocol. This could also be due
to an HTTP request context being aborted by the server (possibly due to the
service shutting down). See server logs for more details.]

TINSA.PantallaControl.Bfll.PantallaControlBfll.ObtenerTareasNoFinalizadasPorUsuario()
in D:\Proyectos\WorkFlow.Net\Nivel Componentes Aplicacion\Componentes
Aplicacion\TINSA.PantallaControl\Bfll\PantallaControlBfll.cs:80

Any help please ??

It sounds like a serialization problem, try to mark the returned data as DataContract.