Using framework header files in XCode for c++ project

Im having trouble to use Gecode (http://www.gecode.org/download.html) framework for my project.

0.I downloaded and installed the framework. Now it can be found under

/Library/Frameworks/gecode.framework

1. I created a new "Command Line Tool" project, and selected "C++" for the type.
2. The i opened the Target of my project and added gecode.framework in Build Phases -> Link Binary With Libaries
3. In Build Settings for the path i added folowing path for "Header Search Path" : /Library/Frameworks/gecode.framework
4. Now i tried to build a sample code with following includes:

#include < gecode/driver.hh >

#include < gecode/int.hh >

#include < gecode/minimodel.hh>

--> XCode is complaining that file is not found.

I tried to compile in terminal with g++ and llvm-g++, it compiles without any warnings or errors