Server crash when placing computer down

[R1mP3x]

Hello,

we recently set up a server and everything has been running smoothly, but as soon as we place down a computer, the server crashes. And when someone enters the same chunk as it, it crashes again. We're not sure why and we were lucky that we had worldedit installed to remove it through command.

Anyone able to help us out here? We want to use computers but it just crashes the server.

Using bukkit server as well if it helps. And if needed i can post the plugin list.