Include files in Early Development (help)

Am taking apart code in the OculusSDK as an early part of developing a project. Am consistently encountering error C1083: Cannot open include file "<include file>": No such file or directory". This happens when attempting to build code in the SDK as is. For instance, when building OculusWorldDemo.cpp, the error reads "Cannot open include file: "OculusWorldDemo.h": No such file or directory". When an additional include directory is added (in Visual Studio), the error reads a different file, "Kernel/OVR_Types.h". These files are all in place in the SDK. Am grateful for help that'll deepen my understanding of what's going on. Any helpful thoughts as to why this may happen?