Problema al Generar la consulta Dinamica de Expedientes

Me genera el siguiente error al generar la consulta dinámica de expedientes

System.InvalidOperationException The type String cannot be constructed. You must configure the container to supply this value.

Microsoft.Practices.Unity.ResolutionFailedException: Resolution of the dependency failed, type = "Aseinfo.VH4.OData.EmpleadosLivePivotCollection", name = "(none)". Exception occurred while: while resolving. Exception is: InvalidOperationException - The type String cannot be constructed. You must configure the container to supply this value.

At the time of the exception, the container was:

Resolving Aseinfo.VH4.OData.EmpleadosLivePivotCollection,(none) Resolving parameter "connectionString" of constructor Aseinfo.VH4.OData.EmpleadosLivePivotCollection(System.String connectionString, System.String viewImageUrl) Resolving System.String,(none) ---> System.InvalidOperationException: The type String cannot be constructed. You must configure the container to supply this value. en Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.GuardTypeIsNonPrimitive(IBuilderContext context, SelectedConstructor selectedConstructor) en Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.PreBuildUp(IBuilderContext context) en Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) en Microsoft.Practices.ObjectBuilder2.DynamicMethodBuildPlanCreatorPolicy.CreatePlan(IBuilderContext context, NamedTypeBuildKey buildKey) en Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext context) en Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) en Microsoft.Practices.ObjectBuilder2.BuilderContext.NewBuildUp(NamedTypeBuildKey newBuildKey) en BuildUp_Aseinfo.VH4.OData.EmpleadosLivePivotCollection(IBuilderContext ) en Microsoft.Practices.ObjectBuilder2.BuildPlanStrategy.PreBuildUp(IBuilderContext context) en Microsoft.Practices.ObjectBuilder2.StrategyChain.ExecuteBuildUp(IBuilderContext context) en Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, Object existing, String name, IEnumerable1 resolverOverrides) --- Fin del seguimiento de la pila de la excepción interna --- en Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, Object existing, String name, IEnumerable1 resolverOverrides) en Microsoft.Practices.Unity.UnityContainer.DoBuildUp(Type t, String name, IEnumerable`1 resolverOverrides) en Aseinfo.Infrastructure.Services.LivePivot.Internal.FactoryClassFinder.Find(String folderPath) en c:BuildAgentwork89066541112bb801InfrastructureServicesLivePivotInternalFactoryClassFinder.cs:línea 40 en Aseinfo.Infrastructure.Services.LivePivot.Internal.CollectionFactories.AddFromFolder(String folderPath) en c:BuildAgentwork89066541112bb801InfrastructureServicesLivePivotInternalCollectionFactories.cs:línea 44 en Aseinfo.Infrastructure.Services.LivePivot.LivePivotHttpHandlersImplementation.ServeCxml(HttpContext context) en c:BuildAgentwork89066541112bb801InfrastructureServicesLivePivotLivePivotHttpHandlersImplementation.cs:línea 118 en System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() en System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)