item respawn

please, help me, i use these triggers :

function Trig_Reagents_Respawn_Func001C takes nothing returns boolean
if ( not ( GetItemTypeId(GetManipulatedItem()) == 'I00I' ) ) then
return false
endif
return true
endfunction

function Trig_Reagents_Respawn_Func002C takes nothing returns boolean
if ( not ( GetItemTypeId(GetManipulatedItem()) == 'I00H' ) ) then
return false
endif
return true
endfunction

function Trig_Reagents_Respawn_Actions takes nothing returns nothing
local location loc_item
local location loc_item2
if ( Trig_Reagents_Respawn_Func001C() ) then
set loc_item = GetItemLoc(GetManipulatedItem())
call PolledWait( 5.00 )
call CreateItemLoc( GetItemTypeId(GetManipulatedItem()), loc_item )
call RemoveLocation(loc_item)
set loc_item = null
else
call DoNothing( )
endif
if ( Trig_Reagents_Respawn_Func002C() ) then
set loc_item2 = GetItemLoc(GetManipulatedItem())
call PolledWait( 5.00 )
call CreateItemLoc( GetItemTypeId(GetManipulatedItem()), loc_item2 )
call RemoveLocation(loc_item2)
set loc_item2 = null
else
call DoNothing( )
endif
endfunction

//===========================================================================
function InitTrig_Reagents_Respawn takes nothing returns nothing
set gg_trg_Reagents_Respawn = CreateTrigger( )
call TriggerRegisterAnyUnitEventBJ( gg_trg_Reagents_Respawn, EVENT_PLAYER_UNIT_PICKUP_ITEM )
call TriggerAddAction( gg_trg_Reagents_Respawn, function Trig_Reagents_Respawn_Actions )
endfunction

they're supposted to respawn reagents in my map, but items wont appear again if i remove them from hero inventory with trigger (after i pick up them) and they will respawn again in more places if i drop them. How to fix that ? please,help .thx.