You must have missed pasting in the aliases in the config, or at least this part of the script. This is the part of the script that controls +zoom2 and -zoom2. Make sure it's in your script.
alias +zoom2 "crosshair 27;fov 30;sensitivity 2.6;bind mouse3 -zoom2;zum12"
alias -zoom2 "crosshair 16;fov 130;sensitivity 7.0;bind mouse3 +zoom2;bind mwheelup tossgren;bind mwheeldown tossgren"
But if you haven't put all the aliases in your config, do that as well. That would cause them not to work. Sorry for the late reply, been on vacation.