Problemas con pagina de Errores

[Zafer]

Esta es la descripcion del error

System.Web.HttpException: El cliente está desconectado. ---> System.Web.UI.ViewStateException: Estado de vista no válido. Client IP: 200.1.173.5 Port: 16186 User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30) ViewState: /wEPDwULLTExNjUzOTYxNDMPZBYCAgEPZBY0AgEPDxYCHgRUZXh 0BRxKVUFOIENBUkxPUyBCT05ORVQgSkFSQU1JTExPZGQCAw8PF gIfAAUSIFJlc2VydmE6IE5BQ0lPTkFMZGQCBQ8PFgQfAAUpTE9 TIENBTVBPUyBFTiBST0pPIENPTiAqIFNPTiBPQkxJR0FUT1JJT 1MeB1Zpc2libGVnZGQCCQ8QDxYCHgtfIURhdGFCb3VuZGcWAh4 IT25DaGFuZ2UFF2phdmFzY3JpcHQ6bmV3V2luZG93KCk7DxYMA gECAgIDAgQCBQIGAgcCCAIJAgoCCwIMFgwQBWRDRU5UUk8gUEF SQSBMT1MgVFJBQkFKQURPUkVTIElQUyBTLkEgLSBDUFQgICAgI CAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA gICAgICAgICAgICAgICAgBQk4MTEwMDUyNDZnEAVkQ09NUEFOS UEgU1VSQU1FUklDQU5BIERFIFNFR1VST1MgUy5BICAgICAgICA gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgI CAgICAgICAgICAgICAgICAgIAUJODkwOTAzNDA3ZxAFZENPTVB BTklBIFNVUkFNRVJJQ0FOQSBTRUdVUk9TIERFIFZJREEgUy5BL iAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICA gICAgICAgICAgICAgICAgICAgICAFCTg5MDkwMzc5MGcQBWRES U5BTUlDQSBJUFMgICAgICAgICAgICAgICAg... ---> System.FormatException: Longitud no válida para una matriz de caracteres Base-64. en System.Convert.FromBase64String(String s) en System.Web.UI.ObjectStateFormatter.Deserialize(Str ing inputString) en System.Web.UI.ObjectStateFormatter.System.Web.UI.I StateFormatter.Deserialize(String serializedState) en System.Web.UI.Util.DeserializeWithAssert(IStateFor matter formatter, String serializedState) en System.Web.UI.HiddenFieldPageStatePersister.Load() --- Fin del seguimiento de la pila de la excepción interna --- --- Fin del seguimiento de la pila de la excepción interna --- en System.Web.UI.ViewStateException.ThrowError(Except ion inner, String persistedState, String errorPageMessage, Boolean macValidationError) en System.Web.UI.ViewStateException.ThrowViewStateErr or(Exception inner, String persistedState) en System.Web.UI.HiddenFieldPageStatePersister.Load() en System.Web.UI.Page.LoadPageStateFromPersistenceMed ium() en System.Web.UI.Page.LoadAllState() en System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) en System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) en System.Web.UI.Page.ProcessRequest() en System.Web.UI.Page.ProcessRequestWithNoAssert(Http Context context) en System.Web.UI.Page.ProcessRequest(HttpContext context) en ASP.clientes_solicitud_reserva_finalizacion_aspx.P rocessRequest(HttpContext context) en System.Web.HttpApplication.CallHandlerExecutionSte p.System.Web.HttpApplication.IExecutionStep.Execut e() en System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean& completedSynchronously)