i have this problem with task manager on kde4.1 it only shows 1 line and it does not group similar programs like kde 4.0 or 3.5x instead i end up with this long line of small icons ive searched for a fix and found this one

multirows task manager by 8siem KDE-Look.org
but when i follow the instructions i end up with this error

scrarfussi@linux-w77s:~/Downloads/tasks/build> cmake -DCMAKE_INSTALL_PREFIX=/usr/lib/kde4
CMake Error: The source directory "/home/scrarfussi/Downloads/tasks/build" does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.

is there another solution or can anyone help me figure out whats causing this error thank you