Erro silverlight 3 com WebServices

Srs. Boa Noite!      Estou tendo um problema numa aplicação que estou desenvolvendo utilizando silverlight 3 e web services, o mais estranho é que o metodo de inclusão funciona perfeitamente, já o metodo de consulta da a msg abaixo:   System.ServiceModel.CommunicationException was unhandled by user code
  Message="The remote server returned an error: NotFound."
  StackTrace:
       at System.ServiceModel.AsyncResult.End[TAsyncResult](IAsyncResult result)
       at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
       at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
       at System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result)
       at LMTSL.WebServBanco.WSBancoSoapClient.WSBancoSoapClientChannel.EndConsultarBanco(IAsyncResult result)
       at LMTSL.WebServBanco.WSBancoSoapClient.LMTSL.WebServBanco.WSBancoSoap.EndConsultarBanco(IAsyncResult result)
       at LMTSL.WebServBanco.WSBancoSoapClient.EndConsultarBanco(IAsyncResult result)
       at LMTSL.WebServBanco.WSBancoSoapClient.OnEndConsultarBanco(IAsyncResult result)
       at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)
  InnerException: System.Net.WebException
       Message="The remote server returned an error: NotFound."
       StackTrace:
            at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
            at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
            at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result)
       InnerException: System.Net.WebException
            Message="The remote server returned an error: NotFound."
            StackTrace:
                 at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
                 at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
                 at System.Net.Browser.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState)
            InnerException:
E sinceramente já vasculhei a internet e nada de resolver meu problema. Vale ressaltar que é minha primeira aplicação web, pois no modelo forms nunca tive problemas.      Desde já agradeço a todos pela atenção      Anderson