HaloMods "Classic" Read-only Archive

Ok when I inject a new meta (Ex. sniper to plasma_turret_bolt.proj) it will let me change the damage but it has no effect on the game. So if I put it on 120 or 99999999999 it is still the same.
Someone help me I want to change it.

Do you click save changes?

if youre using the autoupdates the damages might be hardcoded into the xbe meaning u cant change them by editing the map