[1.6.4][SSP/SMP] Melee turtle crashes the server

Hello, we used melee turtles on our server to create ourselves an xp farm, but whenever the turtles kills a mob, the server crashes.
Tried in singleplayer, same problem : The turtle kills the mob and at the same time, the game crashes.
We are using a really simple program

While true do
turtle.attack()
turtle.drop()
end

so we shouldn't have any problem.
Here's the pastebin of the crash : http://pastebin.ca/2662672

Thanks for the help!

This is a bug in SoulSReborn. It is attempting an illegal cast operation on ComputerCraft's fake player. Try updating that mod. You could also try updating ComputerCraft to 1.58, but the bug is in SoulSReborn.

You could try autonomous activators from TE.

Contacted the SSR support. The modder fixed it already. Thanks for the help guys :)/>