Three20 API Integration Problem

Three20/Three20.h:No such file or directory

I am getting this error when after following all steps found at this link: https://github.com/facebook/three20/ I guess the problem with the header search path which i set as: ../three20/Build/Products/three20

Do i need to take care of the Three20 framework's directory? please advise..开发者_StackOverflow中文版

Please check out the following resources:

• Three20 From the Ground Up Episode #1: Building Three20 for the first time
• Add Three20 to your project