Xcode SCM - not all files are being tracked. Use Versions?

I am new to subversion.

I've tried Versions application, and very soon got disappointed - it doesn't copy .xcodeproj file properly(project doesn't launch and says that some file is missing) and is really bothering when I want to modify my project/remove some files. And I couldn't find any decent guide on it.

So I am trying out Xcode's built in SCM tool.开发者_运维百科 It is working better, but it doesn't see when some files in the project were modified. I've got a folder called "CODE CORE" and it is placed in a directory that is one level up from my project directory. It has some code that I use among different applications. And when I change code within that folder, the edited file is not being marked with M symbol(in the SCM column). So it is not being committed to the repository, however the file itself is a part of working copy.

What may be the problem and how I fix it?

Thank you in advance.