Error in RagDoll Slaughter V3

I keep getting an error whenever I activate the fan. Here is the fan, and the error I’m getting when I try to activate it:

(Fan)
http://imageshack.us/photo/my-images/15/2011121000002d.jpg/

(error)

http://imageshack.us/photo/my-images/545/2011121000004.jpg/

Any help would be greatly appreciated.

Thanks.