hyperhedgy

In equivalent exchange on my server using any of the tools right click function causes the little black condensed item's to from but when i try and pick it up it causes an internal server error and from then on it will not let me back in the server saying there is an error still can i please have some help! it works in single player too! here is the server log from when it is necessarily if you need anything else just say http://pastebin.com/WdPe0pM8 Please Help!!