Windows Service Controller Exception - Why?

[Tom J]

I have this code:

System.ServiceProcess.ServiceController sc = new
System.ServiceProcess.ServiceController("MyService ");

if(sc.Status == System.ServiceProcess.ServiceControllerStatus.Stop ped)

{

sc.Start();

}

sc.WaitForStatus(System.ServiceProcess.ServiceCont rollerStatus.Running,new
TimeSpan(0,0,0,30,0));

if(sc.Status == System.ServiceProcess.ServiceControllerStatus.Runn ing)

{

try

{

sc.ExecuteCommand(1); //exception happens here

}

catch(System.Exception ex)

{

sc.Stop();
sc.WaitForStatus(System.ServiceProcess.ServiceCont rollerStatus.Stopped);

MessageBox.Show(ex.Message);

Application.Exit();

}

}

the sc.ExcecuteCommand(1) throws the following exception:

Cannot control MyService service on computer "."

the inner exception is: Access Denied

My question is: Why can I start, stop, etc. MyService but not use the
ExecuteCommand method?

Thanks!

Tom