colshape issue

[-Blaze-]

hello ,

i'm trying to make an object move that has a colshape attached to it and if any ped hits that object while it's moving , it dies.

function bindall (guy) 
bindKey(guy, "mouse1", "down", shootProjectile, guy) 
end 
addCommandHandler("bindit", bindall) 
  
  
function shootProjectile(guy) 
local length = 100 
  
local x, y, z = getElementPosition( guy ) 
local _, _, rz = getElementRotation( guy ) 
local tx = x + - ( length ) * math.sin( math.rad( rz ) ) 
local ty = y + length * math.cos( math.rad( rz ) ) 
local tz = z 
  
  
  
  
local obj = createObject ( 1369, x, y , z + 0.5, 0, 90, rz+90) 
local theCol = createColSphere ( x, y, z , 2 ) 
setElementData( theCol, "spearColOwner", guy) 
attachElements( theCol, obj , 0, 0, 0) 
setElementParent(theCol,obj) 
  
setPedAnimation( guy, "GRENADE", "WEAPON_throw", 500, false, false, false, false) 
  
moveObject ( obj, 1500, tx, ty, tz) 
  
  
end 
  
  
function onHit(player) 
   theOwner = getElementData(source,"spearColOwner") or false 
    
   if (theOwner == false) then return end 
   if((theOwner == player)) then  return end 
    
  
    killPed(player) 
    
end 
addEventHandler("onColShapeHit", root,onHit) 

The problem is that when i shoot the object out , it passes through the ped but ped doesn't get killed.

I used setDevelopmentMode and /showcol to check the col position and everything is in place , exept the col doesn't detect anything that entered it.

However , if i shoot about 10 cols at the same time , the Ped dies.

it's pretty crazy . Any help?