Падают Unit-тесты. EnterpriseLibrary 5.0. Logger.Write(message, category);

Test Outcome:   Failed
Test Duration:  0:00:00,035
 
Result Message: 
Microsoft.Practices.ServiceLocation.ActivationException : Activation error occured while trying to get instance of type LogWriter, key ""
  ----> Microsoft.Practices.Unity.ResolutionFailedException : Resolution of the dependency failed, type = "Microsoft.Practices.EnterpriseLibrary.Logging.LogWriter", name = "(none)".
Exception occurred while: while resolving.
Exception is: InvalidOperationException - The type LogWriter does not have an accessible constructor.
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At the time of the exception, the container was:
 
  Resolving Microsoft.Practices.EnterpriseLibrary.Logging.LogWriter,(none)
 
  ----> System.InvalidOperationException : The type LogWriter does not have an accessible constructor.
Result StackTrace:  
at Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance(Type serviceType, String key) in c:\Home\Projects\CommonServiceLocator\main\Microsoft.Practices.ServiceLocation\ServiceLocatorImplBase.cs:line 53
at Microsoft.Practices.ServiceLocation.ServiceLocatorImplBase.GetInstance[TService]() in c:\Home\Projects\CommonServiceLocator\main\Microsoft.Practices.ServiceLocation\ServiceLocatorImplBase.cs:line 90
at Microsoft.Practices.EnterpriseLibrary.Logging.Logger.get_Writer()
at Microsoft.Practices.EnterpriseLibrary.Logging.Logger.Write(Object message, String category)
at NetDocuments.Client.Common.Infrastructure.Tracing.LogWriterAdapter.Write(Object message, String category, Boolean tracingModeCheck) in d:\ndOfficeRepository\MSOfficeIntegration\NetDocuments.Client.Common\Infrastructure\Tracing\LogWriterAdapter.cs:line 19
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