[CW 2.8] SOURCEPATH, multiple directories

Hi,
I want to structure the sources of my project like

src/
src/common
src/utils

So I added the following statements to my mmp file and imported it into
CW.

[Location of mmp-file is %projectDir%/group/project.mmp]
....
SOURCEPATH        ..\src
SOURCE            SrcSource1.cpp
SOURCE            SrcSource2.cpp

SOURCEPATH        ..\src\common
SOURCE            CommonSource1.cpp
SOURCE            CommonSource2.cpp

SOURCEPATH        ..\src\utils
SOURCE            UtilsSource1.cpp
SOURCE            UtilsSource2.cpp
....

CW shows the above sourcefiles in the projectsexplorer in the
"Sources"-group, but can't find/open them.

Bug, feature or my mistake?
TX