And the error is like this:

Service cannot be started. System.IO.FileLoadException: Could not load file or assembly 'ReportingServicesNativeServer, Version=0.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log for more detail. (Exception from HRESULT: 0x800736B1)

File name: 'ReportingServicesNativeServer, Version=0.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' ---> System.Runtime.InteropServices.COMException (0x800736B1): The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log for more detail. (Exception from HRESULT: 0x800736B1)

at Microsoft.ReportingServices.Library.ServiceAppDomainController..ctor()

at Microsoft.ReportingServices.Library.ReportService.OnStart(String[] args)

at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(Object state)