Enemy Trigger problems

[omiwrench8k]

So what I'm trying to do is to make an enemy active and patrolling when I pick up a key, pretty standard stuff. I can't get it to work though, so if any of you could tell me what I'm doing you'll have my eternal gratitude.
void OnStart( )
{
//Item & Interaction Callbacks
SetEntityCallbackFunc("key_tomb_1", "StartGrunt_1");

void StartGrunt_1(string &in asEntity)
{
SetEntityActive("servant_grunt_1", true);
SetSwingDoorLocked("mansion_2", true, false);
SetEntityActive("BoxLight_2", false);
SetMessage("Message", "RunMonster", 6);
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_1", 2, "");
Then some path nodes, etc...