Hi, can you verify that Server.xml exists? It should be at [install-dir]/conf/Server.xml
Make sure it has not been moved or renamed.
Also, make sure Server.xml contains the <CommandInterface> node at the top of the file:
Lastly, when you attempt to shut down the server, do you see this line at the bottom of the console window:
INFO server comment - CommandInterfaceCommandShutdownServer.invoke: Shutting down server.
INFO vhost vhost-stop _defaultVHost_ -
INFO server server-stop - -