xcode 4.5.1。标题搜索路径不工作，文件未找到

I have added a include directory in my home directory. I can run "ls -l ~/include" from the build directory. I have added that directory in both "Header Seach Path" and in "User Header Search Path". In both places I have tried with both non-recursive and recursive. But xcode 4.5.1 can not in any situation find the first stated header file.I have added a include directory in my home dir