Okay i finish it and i test it it's working fine all controlled by cvar :
PHP Code:
knife_effect(default:1) //make effect when kill
knife_jump(default:380.0) // controll gravity
knife_dmg(default:5) // controll damage
knife_spd(default:500.0) // controll speed
knife_power(default:17) // controll knockback power
P.S : i test it with PodBot if you can test it with real player that could be more beeter.
model and sound and .sma files are in .zip ;).
UPDATE : Logs in .zip