Please help!!! With the game (Half-Life)

Guys help, I used to play and in the half-time everything was fine with this setting: I changed the squat to the letter "q" and everything worked, and now from a not long time does not work to the fact squat works but at the same time with the jump is not! It turns out on the jump does not jump and on the ctrl everything is normal. This specially made I understand that did not put a squat on Y.? I don't understand anything that's crazy at all.10 years played on now what kind of game. Help