Spawn a creature

Hey all, i need an script to spawn a creature into an area, i kno that as this is an area of MY MOD it doesn't need GDA file or something.
im using this script, but i know something is missing, help me please


void main()
{    
    object oWaypoint = GetObjectByTag("wp_spawn_serken");
    location lWaypoint = GetLocation(oWaypoint);
    object oSerKen = CreateObject(OBJECT_TYPE_CREATURE, R"party_serken.utc", lWaypoint);
}

someone? please?