當通過域服務（WCF RIA）加載實體時出現DomainOperationException

我有一個簡單的Silverlight項目，它只是在IIS 7.5系統上獲取一組實體（EF 4）。這裏是我的web配置：當通過域服務（WCF RIA）加載實體時出現DomainOperationException

<configuration> 
    <system.webServer> 
    <modules runAllManagedModulesForAllRequests="true"> 
     <add name="DomainServiceModule" preCondition="managedHandler" type="System.ServiceModel.DomainServices.Hosting.DomainServiceHttpModule, System.ServiceModel.DomainServices.Hosting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> 
    </modules> 
    <validation validateIntegratedModeConfiguration="false" /> 
    </system.webServer> 
    <system.web> 
    <httpModules> 
     <add name="DomainServiceModule" type="System.ServiceModel.DomainServices.Hosting.DomainServiceHttpModule, System.ServiceModel.DomainServices.Hosting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" /> 
    </httpModules> 
    <compilation debug="true" targetFramework="4.0"> 
     <assemblies> 
     <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> 
     </assemblies> 
    </compilation> 
    </system.web> 
    <connectionStrings> 
    <add name="BusinessProcessEntities" connectionString="metadata=res://*/ForecastModel.csdl|res://*/ForecastModel.ssdl|res://*/ForecastModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=usd-ctct-app-01.mydomain.net;Initial Catalog=BusinessProcess;Integrated Security=True;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" /> 
    </connectionStrings> 
    <system.serviceModel> 
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" /> 
    </system.serviceModel> 
</configuration>

當我瀏覽到http://forecasting.mydomain.net/ClientBin/ForecastTool_2-Web-ForecastDomainSvc.svc?wsdl我看到服務網頁。小提琴家給了我什麼都沒有真正去繼續。 SQL事件探查器不顯示查詢命中數據庫服務器。正如你所期望的，一切都與卡西尼合作。這是顯示錯誤消息的彈出消息。只是不知道我在這裏做錯了什麼。我覺得這應該是簡單的比它現在...

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