[CMake] kdevelop problems

[Luigi Calori]

I' m new to kdevelop and starting to use CMake for it.
I' ve a project that builds correctly with make but has source files 
that resides on  external directory
(outside from CMAKE_SOURCE_DIR)
The generated kdevelop projects seems empty from  source files (it shows 
only CMakelists.txt inside CMAKE_SOURCE_DIR)
Nevertheless the project builds.
Did I do something wrong or the placing of source files outside from 
CMAKE_SOURCE_DIR prevent listing inside kdevelop?

Thanks in advance
                                 Luigi