Kør program fra windows service

Process p = new Process();
string path = Path.Combine(envPath, "CopyService.exe");
TransVikaliService.getServiceEventLog().WriteEntry("stien er: " + path);
p.StartInfo.FileName = path;
p.Start();
System.Diagnostics.Process[] myProcesses;
myProcesses = System.Diagnostics.Process.GetProcessesByName("CopyService.exe");
//wait for process to finish copying files.....
foreach (System.Diagnostics.Process instance in myProcesses)
{
    instance.WaitForExit(3000);
    instance.CloseMainWindow();
}