Can't find module Language Switcher

Hi guys,
I installed penguinmail quickstart 1.6 on localhost.
But i can't find Language Switcher module on the module list. When i go to the modules folder, the module is there (mod_languages).
On contrary i when i do a Joomla 1.6 fresh install this module it is on the module list.

Do i miss something here ? How can i put this module on the module list again ?

Thans for helping
Yannis