Did you tried dr_allow_autojump 1?
That sounds like a gamemode specific command. He may not be using the same gamemode you are.
Setting up bunnyhop can be very tricky. It can take a long time to perfect. When I made one, I believe it required lot of code to adjust hulls, velocity, speeds, and much more. That's getting advanced though. I know there are gamemodes released, perhaps take a look at one of those.
