1. The device is not (correctly) included in a Z-Wave network. Include the device and try it again.
2. Are you using the right tags? The supported protocols are ISO15693, ISO18000-3, Tag-it™.
3. The batteries are so empty that the device cannot startup, try putting new ones in.
4. The tamper switch is not fully or properly pressed. You should hear a clicking sound when the Tamper switch is pressed in completely.