Created Unassigned: System.IO.FileNotFoundException V1Interop.ITaskScheduler.Activate [11938]

Can you help me, I just got this error on Windows XP Pro (SP3)

System.IO.FileNotFoundException: The system cannot find the file specified. (Exception from HRESULT: 0x80070002)
at Microsoft.Win32.TaskScheduler.V1Interop.ITaskScheduler.Activate(String Name, Guid& riid)
at Microsoft.Win32.TaskScheduler.TaskService.GetTask(ITaskScheduler iSvc, String name)
at Microsoft.Win32.TaskScheduler.TaskService.GetTask(String taskPath)
at SmartShare.schedulemanager.ScheduleSleep(Int32 idleSetting)
at SmartShare.My.MyApplication.MyApplication_Startup(Object sender, StartupEventArgs e)