as shown by the error messages when startx is called : Can't exec "xprop": No such file or directory at /usr/share/pekwm/scripts/pekwm_ws_menu.pl line 21. Use of uninitialized value in split at /usr/share/pekwm/scripts/pekwm_ws_menu.pl line 21. Use of uninitialized value in foreach loop entry at /usr/share/pekwm/scripts/pekwm_ws_menu.pl line 25.
Fixed! :)