Move item from Mail box to backpack problem;/

[dekros]

		local contfrom = Container.New('Your Inbox')
		while not contfrom:isOpen() do
			contfrom = Container.New('Your Inbox')
			local dp = Container.New('Locker')
			for mailspot, touse in dp:iItems() do
				if touse.id == 12902 then
                dp:UseItem(mailspot, true)
                wait(500, 1700)
				end
			end
		end
				local DestinationBp = Container.GetByName("Blue Backpack")
				for spot = 0, contfrom:ItemCount() do 
					local item = contfrom:GetItemData(spot)
						if(Self.Cap() - Item.GetWeight(item.id) <1) then
							Walker.Start()
							break
						end
						if(DestinationBp:ItemCount() == 20) then
							DestinationBp:UseItem(DestinationBp:ItemCount()-1,true)
						end
						print("add")
						--if not (contains(Item.GetName(item.id),BlueDjinn)) then
							contfrom:MoveItemToContainer(spot,DestinationBp:Index(),0)
						--end
					wait(500,550)
				end

but add items to random bp or do nothink and print add;//

[M4N93]

		local contfrom = Container.New('Your Inbox')
		while not contfrom:isOpen() do
			contfrom = Container.New('Your Inbox')
			local dp = Container.New('Locker')
			for mailspot, touse in dp:iItems() do
				if touse.id == 12902 then
                dp:UseItem(mailspot, true)
                wait(500, 1700)
				end
			end
		end
				local DestinationBp = Container.GetByName("Blue Backpack")
				for spot = 0, contfrom:ItemCount() do 
					local item = contfrom:GetItemData(spot)
						if(Self.Cap() - Item.GetWeight(item.id) <1) then
							Walker.Start()
							break
						end
						if(DestinationBp:ItemCount() == 20) then
							DestinationBp:UseItem(DestinationBp:ItemCount()-1,true)
						end
						print("add")
						--if not (contains(Item.GetName(item.id),BlueDjinn)) then
							contfrom:MoveItemToContainer(spot,DestinationBp:Index(),0)
						--end
					wait(500,550)
				end

but add items to random bp or do nothink and print add;//

YO! I used this and its awesome but it get stuck after withdrawing 31 items? :S always 31 items somehow. u know how to fix this? :P