Trying to control Services on Remote Server

Hello,

I have the following code:

ServiceController controller = new ServiceController();
controller.MachineName = "//ServerName";
controller.ServiceName = "SMTP";
string status = controller.Status.ToString(); // This line errors out with
the following error

Cannot open SMTP service on computer '//ServerName'.

If have tried using "Simple Mail Transfer Protocol (SMTP)" for the service
name with the same result. Is there something I am overlooking here???