BBJames

Using Tekkit Lite 0.6.5, we have an Advanced Repulsion System set up that uses an item detector so as not to target certain players. This works fine. UNTIL, the server is restarted, then the item that was in the detector disappears and consequently kills everyone near it. Anyone else have this issue? Is it only caused by items not in vanilla minecraft maybe? I use one of the inverted lamps.