CRM 4.0: Plugins not work after migration to CRM 2011

Situation:

>Crm Exception: Message: Unable to load the plugin type: ORBIS.EmailToCallPlugin.EmailToCallPlugin, ErrorCode: -2147204720, InnerException: System.IO.FileLoadException: Could not load file or assembly ‘Microsoft.Crm.Sdk, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35′ or one of its dependencies. The located assembly’s manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

File name: ‘Microsoft.Crm.Sdk, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35′

at System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type)

at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)

at Microsoft.Crm.Extensibility.PluginTypeFactory.LoadType(String qualifiedTypeName, Assembly assembly)

Detail: <OrganizationServiceFault xmlns=”http://schemas.microsoft.com/xrm/2011/Contracts” xmlns:i=”http://www.w3.org/2001/XMLSchema-instance“>

  <ErrorCode>-2147204720</ErrorCode>

  <ErrorDetails xmlns:a=”http://schemas.datacontract.org/2004/07/System.Collections.Generic“>

    <KeyValuePairOfstringanyType>

      <a:key>CallStack</a:key>

      <a:value i:type=”b:string” xmlns:b=”http://www.w3.org/2001/XMLSchema“> at Microsoft.Crm.Extensibility.VersionedPluginProxyStepBase.Execute(PipelineExecutionContext context)

   at Microsoft.Crm.Extensibility.Pipeline.Execute(PipelineExecutionContext context)

   at Microsoft.Crm.Extensibility.MessageProcessor.Execute(PipelineExecutionContext context)

   at Microsoft.Crm.Extensibility.InternalMessageDispatcher.Execute(PipelineExecutionContext context)

   at Microsoft.Crm.Extensibility.ExternalMessageDispatcher.ExecuteInternal(IInProcessOrganizationServiceFactory serviceFactory, IPlatformMessageDispatcherFactory dispatcherFactory, String messageName, String requestName, Int32 primaryObjectTypeCode, Int32 secondaryObjectTypeCode, ParameterCollection fields, CorrelationToken correlationToken, CallerOriginToken originToken, UserAuth userAuth, Guid callerId, Guid transactionContextId, Int32 invocationSource, Nullable`1 requestId, Version endpointVersion)

   at Microsoft.Crm.Extensibility.OrganizationSdkServiceInternal.ExecuteRequest(OrganizationRequest request, CorrelationToken correlationToken, CallerOriginToken callerOriginToken, WebServiceType serviceType)

   at Microsoft.Crm.Extensibility.OrganizationSdkServiceInternal.Delete(String entityName, Guid id, CorrelationToken correlationToken, CallerOriginToken callerOriginToken, WebServiceType serviceType)</a:value>

    </KeyValuePairOfstringanyType>

  </ErrorDetails>

  <Message>Unable to load the plugin type: ORBIS.CallQueuePlugin.CallQueuePlugin</Message>

  <Timestamp>2012-03-06T08:38:32.1875784Z</Timestamp>

  <InnerFault>

    <ErrorCode>-2147204720</ErrorCode>

    <ErrorDetails xmlns:a=”http://schemas.datacontract.org/2004/07/System.Collections.Generic“>

      <KeyValuePairOfstringanyType>

        <a:key>CallStack</a:key>

        <a:value i:type=”b:string” xmlns:b=”http://www.w3.org/2001/XMLSchema“> at Microsoft.Crm.Extensibility.PluginTypeFactory.LoadType(String qualifiedTypeName, Assembly assembly)

   at Microsoft.Crm.Caching.PluginTypeCacheLoader.LoadCacheData(Guid key, IOrganizationContext context)

   at Microsoft.Crm.Caching.CrmMultiOrgCache`2.CreateEntry(TKey key, IOrganizationContext context)

   at Microsoft.Crm.Caching.CrmSharedMultiOrgCache`2.LookupEntry(TKey key, IOrganizationContext context)

   at Microsoft.Crm.ObjectModel.SdkMessageProcessingStepServiceInternal`1.VerifyIsolationLevel(IBusinessEntity entity, ExecutionContext context)

   at Microsoft.Crm.ObjectModel.SdkMessageProcessingStepServiceInternal`1.Delete(BusinessEntityMoniker moniker, ExecutionContext context)</a:value>

      </KeyValuePairOfstringanyType>

    </ErrorDetails>

    <Message>Unable to load the plugin type: ORBIS.CallQueuePlugin.CallQueuePlugin</Message>

    <Timestamp>2012-03-06T08:38:32.1875784Z</Timestamp>

    <InnerFault>

      <ErrorCode>-2147220970</ErrorCode>

      <ErrorDetails xmlns:a=”http://schemas.datacontract.org/2004/07/System.Collections.Generic“>

        <KeyValuePairOfstringanyType>

          <a:key>CallStack</a:key>

          <a:value i:type=”b:string” xmlns:b=”http://www.w3.org/2001/XMLSchema“> at System.Reflection.RuntimeAssembly.GetType(RuntimeAssembly assembly, String name, Boolean throwOnError, Boolean ignoreCase, ObjectHandleOnStack type)

   at System.Reflection.RuntimeAssembly.GetType(String name, Boolean throwOnError, Boolean ignoreCase)

   at Microsoft.Crm.Extensibility.PluginTypeFactory.LoadType(String qualifiedTypeName, Assembly assembly)</a:value>

        </KeyValuePairOfstringanyType>

      </ErrorDetails>

      <Message>System.IO.FileLoadException: Microsoft Dynamics CRM has experienced an error. Reference number for administrators or support: #2F7B98AB</Message>

      <Timestamp>2012-03-06T08:38:32.1875784Z</Timestamp>

      <InnerFault i:nil=”true” />

      <TraceText i:nil=”true” />

    </InnerFault>

    <TraceText i:nil=”true” />

  </InnerFault>

  <TraceText i:nil=”true” />

</OrganizationServiceFault>