windows service open exe แล้วเกิด error A program running on this computer is trying to display a message

                ProcessStartInfo startinfo = new ProcessStartInfo();
                Process pStart = new Process();

                startinfo = new ProcessStartInfo(@"D:\Jobs\JoinPle\BPCSOrderRunSchedule\BPCSOrderRunSchedule\bin\Debug\BPCSOrderRunSchedule.exe");
                pStart.StartInfo = startinfo;
                pStart.Start();
                pStart.WaitForExit();
                pStart.Close();