[Mugala]

are u sure you're not using OnPlayerGiveDamage func in another code?
make sure and also check this.

PHP код:

public OnPlayerGiveDamage(playerid, damagedid, Float:amount, weaponid, bodypart)
{
    new formatting[128];
    format(formatting,128,"you just on bodypart ID: %d",bodypart);
    SendClientMessage(playerid,-1,formatting);
    return 1;
} 


check if head is detectable.