Eclipse中的include路径问题

Cocos2d-x
#1

用Eclipse编译HelloCpp时，提示找不到cocos2d.h：
jni/…/…/Classes\AppDelegate.h:4:10: fatal error: ‘cocos2d.h’ file not found
#include “cocos2d.h”

于是在properties->C/C++ General->Paths and Symbols->Includes中加入cocos2d.h的路径：D:/Cocos/frameworks/cocos2d-x/cocos
结果还是找不到，为什么呢？