Skull Tag Help

Hey guys. I set up my own server and all and i play co-op with my bro. Everything is working fine and dandy until i try to activate the light amp cheat. I typed in sv_cheats true in the command window and it says game needs to reset to activate cheats. so i make a new game and my partner dissappears. how can i get him to join my game with cheats? he tried the same thing as well but we get taken into our new games without each other...whats wrong?

Just set sv_cheats to true, and reload the map (either using "changemap <map name>", or "map <map name>").

i tried that but my bro cant get into the same game as me ...

Make sure you do it in the server window or with rcon, and that it affects the actual server, rather than just your computer.