On "round end" and "round start"

[DjTranceFire]

Hey guys..
I'm trying to create a small mod and i need to thread a function on start and end of every round.
I tryed "waittill("round_end") and waittill("round_start") but its not working.. :x
Any ideas?

[DidUknowiPwn]

try gameFlagWait

[Nekochan]

Try
level waittil("game_ended");
level waittill("round_ended");


Or not just write some gsc code to call function from Round ending?