Timer not stopping

[Damascus]

PHP Code: (Select All)

void OnStart()
{
    for (int i = 0; i < 14; i++)
    {
        AddEntityCollideCallback("Player", "ShadowArea_"+i, "ShadowDamage", true, 0);
    }
}

void ShadowDamage(string &in asParent, string &in asChild, int alState)
{
    if (alState == 1)
    {
        AddTimer("damage", 2.0f, "TimerDamage");
    }
    else if (alState == -1)
    {
        RemoveTimer("damage");
    }
}

void TimerDamage(string &in asTimer)
{
    GivePlayerDamage(20, "BloodSplat", true, true);
    PlayGuiSound("attack_claw_hit.snt", 0.5f);
    AddTimer("damage", RandFloat(5.0f, 7.0f), "TimerDamage");
} 


I'm trying to make an area that damages you ever 5-7 seconds while you're inside, but stops damaging you when you leave it. However, even after I leave the area, I keep getting damaged over and over. Am I missing something here?