I don't know why, but it doesn't work... I haven't changed your code, i putted the file u attached in your post. Bu I can't throw any knifes... (i am an admin)
EDIT: Oh... sory, i added it to wrong folder. It works great, thanks!
One question, how to change knivies demage to 115? I have this cavar sm_throwingknives_damage "57" but when i put it in console it doesn't work...