Thanks for the tips, but I've already tried a different area/different lift. I'll have to try other items and see if they have the same issue.
I'm having a bit of trouble with the spawn time of my grav lifts. I have two on my map. I want one to spawn at the start of the game, but never...
EDIT: I fixed this by putting the runtime minimum to the maximum. Hope that helps anyone with the same problem Happy forging! =]...