Are you running any mods? This seems to be mod related. You might get better results posting the thread where the mod originates from. If you aren't sure which mod it is, enable one by one and test for the crash, once you have it narrowed down I recommend posting in that mod thread to see if the creator can help you get it figured out.
Edit: If you don't use any mods, let me know. I'll be happy to assist you.