how to use Box2D library in HelloWorld program

i get issue “Box2D/Box2D.h”file not found when I try doing ……

Well, i want to implement Box2D engine in cocos2d hello world program. i have copied the Box2D folder from cocos2d . Now in Build Settings of the project…(in the part Header Search Paths ) i have added the following

  1. “$(SRCROOT)/…/”

  2. “$(SRCROOT)/…/…/”

  3. “$(SRCROOT)/…/…/Box2D”

But still not working…

Your help and comments will be highly appreciated……