HLAE-zooming problem[solved]

hey everyone!
Since my friend tried to record a campath using zooming, He had got a problem that when he types "mirv_zoom_max" with any numbers, it zooms the same and too much. And the resolution was 1280x1024.

Here is the tutorial he followed.
tutorial

If you guys know how to solve it, I will be appreciated.

mirv_zoom_optical 100
mirv_zoom_digital 0
mirv_zoom_speed 150 ( u can play with it a bit)
bind key "mirv_zoom_start"
bind key "mirv_zoom_stop"

gl