CodeLite IDE

I am trying to find a way of sorting my .cpp and .h files into their own folders to make the layout neater and easier to work with.

In CodeLite\Workspace View\Workspace\ProjectName\ProjectName\src I have:
FileNameOne.cpp
FileNameOne.h
FileNameTwo.cpp
FileNameTwo.h
FileNameThree.cpp
FileNameThree.h

I would like this to be:
FileNameOne.cpp
FileNameTwo.cpp
FileNameThree.cpp
FileNameOne.h
FileNameTwo.h
FileNameThree.h

I have tried:
right clicking on src\New Virtual Folder\Virtual Directory Name: Header Files\OK
and
right clicking on src\New Virtual Folder\Virtual Directory Name: cpp Files\OK

I then try to drag the files
FileNameOne.cpp
FileNameTwo.cpp
FileNameThree.cpp
into CodeLite\Workspace View\Workspace\ProjectName\ProjectName\src\cpp Files
and
FileNameOne.h
FileNameTwo.h
FileNameThree.h
into CodeLite\Workspace View\Workspace\ProjectName\ProjectName\src\Header Files
but nothing happens?

If anyone knows, please help.