when i tried to run this command 
gtk-window-decorator --replace
i found that the package compiz-gnome is not installed !!!
however, after installing that package, the decoration for compiz works fine.
but there is another problem the preferences button does not work before and 
after this solution.

-- 
No window decorations on compiz session statup
https://bugs.launchpad.net/bugs/133609
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