Controlling the master volume with the S-30 remote - DirecTV

My master volume was set too low when I programmed the S-30. I'd like to change it back to 25, but can't find out how to do it. I've read previous solution threads, so I tried holding the 'Menu' and 'OK' button, then typing 955, but there is no 'enter' button on the S-30, so I've tried 'CC', 'OK' and doing nothing. But it doesn't seem to work.

This question, "Controlling the master volume with the S-30 remote," is about DirecTV channels, programming, equipment, and sports.