Dr. Mercola can answer that!
http://www.mercola.com/products/coconut_oil.htm
I have a jar of coconut oil in my pantry.. its absolutely great stuff for cooking, even spreading on bread instead of butter.
I too haven't had any experiance losing weight with coconut oil, but I don't really have any weight to lose and don't use coconut oil enough to notice anything..
What Dr. Mercola says about it probably hits the nail on the head.
Hope that helps!