XLure R.T.U. Beetle Floor Trap 1 Box / 10 Traps

I have 2 of these. 1 of them caught 3 of the rice weevils in the first 48 hours. The other caught nothing. I have seen weevils walking around and not go in the trap. I have moved them around to where there are weevils and nothing. I put them both in the cupboard where the most activity happens and there is no food in there, and nothing. These just don't work.