awesome window manager / not working on clean install

Hello,

once installed awesome window manager in LEAP. it wont start at login.

  1. login window / XFCE / lightdm? / XFCE was my installation
  2. select awesome
  3. login
    3.1 tryes to login or start awesome WM
    3.2 must have crashed
  4. returns to login windows

awesome -k / syntax OK!

not sure why it does not work.