please help
System.ApplicationException: WSE842: The service pipeline could not be created. ---> System.FormatException: Failed parsing the policy document. ---> System.TypeLoadException: Could not load type 'Microsoft.Web.Services3.ionDesign.KerberosAssertion' from assembly 'Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
at System.RuntimeTypeHandle._GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName)
at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark)
at System.RuntimeType.PrivateGetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark)
at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
at Microsoft.Web.Services3.Design.Policies.ReadExtensions(XmlReader reader)
at Microsoft.Web.Services3.Design.Policies.ReadXml(XmlReader reader)
--- End of inner exception stack trace ---
at Microsoft.Web.Services3.Design.Policies.ReadXml(XmlReader reader)
at Microsoft.Web.Services3.Configuration.PolicyConfiguration.GetPolicies()
at Microsoft.Web.Services3.Design.Policies.get_Default()
at Microsoft.Web.Services3.PolicyAttribute.Microsoft.Web.Services3.IPipelineProvider.CreateServicePipeline(PipelineCreationContext context)
at Microsoft.Web.Services3.Pipeline.TryCreate(Type type, Boolean forClient)
at Microsoft.Web.Services3.Pipeline.TryCreateForService(Type type)
at Microsoft.Web.Services3.WseProtocol.CreateProtocolPipeline()
at Microsoft.Web.Services3.WseProtocol.RouteRequest(SoapServerMessage message)
at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)
--- End of inner exception stack trace ---
this error was appeared in my application log :
System.ApplicationException: WSE842: The service pipeline could not be created. ---> System.FormatException: Failed parsing the policy document. ---> System.TypeLoadException: Could not load type 'Microsoft.Web.Services3.ionDesign.KerberosAssertion' from assembly 'Microsoft.Web.Services3, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
at System.RuntimeTypeHandle._GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName)
at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark)
at System.RuntimeType.PrivateGetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark)
at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
at Microsoft.Web.Services3.Design.Policies.ReadExtensions(XmlReader reader)
at Microsoft.Web.Services3.Design.Policies.ReadXml(XmlReader reader)
--- End of inner exception stack trace ---
at Microsoft.Web.Services3.Design.Policies.ReadXml(XmlReader reader)
at Microsoft.Web.Services3.Configuration.PolicyConfiguration.GetPolicies()
at Microsoft.Web.Services3.Design.Policies.get_Default()
at Microsoft.Web.Services3.PolicyAttribute.Microsoft.Web.Services3.IPipelineProvider.CreateServicePipeline(PipelineCreationContext context)
at Microsoft.Web.Services3.Pipeline.TryCreate(Type type, Boolean forClient)
at Microsoft.Web.Services3.Pipeline.TryCreateForService(Type type)
at Microsoft.Web.Services3.WseProtocol.CreateProtocolPipeline()
at Microsoft.Web.Services3.WseProtocol.RouteRequest(SoapServerMessage message)
at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, HttpContext context, HttpRequest request, HttpResponse response, Boolean& abortProcessing)
--- End of inner exception stack trace ---
my application was working before but now is not this error appear in my pc develper