CheckPoint from areas (CS Amnesia)

[Zahashi]

void OnEnter()
{
AddEntityCollideCallback("Player", "ScriptArea_1", "Restart", true, 1);
AddEntityCollideCallback("Player","MonsterArea","Apparition", true, 1);
AddEntityCollideCallback("Player","WeirdArea","Bizarre", true, 1);
AddEntityCollideCallback("Player","MinceArea","Mince", true, 1);
AddUseItemCallback("","Key","Prison_Door", "Key_On", true);
AddTimer("TimerName", 0, "Apparition");
}

void Restart(string &in asParent, string &in asChild, int alState)
{
CheckPoint("", "PlayerStartArea_4","DeathCategory", "Deathtext");
}

Please Help, i followed this tutorial : http://wiki.frictionalgames.com/hpl2/tut...riptarea_s

But it doesn't work and error =" ERR ; No matching signatures to 'CheckPoint(string@&,string@&,string@&,string@&)' "

(I'm french so i don't understand everytime)