authentication module not showing

I have installed the auth_moodle in the correct area. When I logged back into moodle the application gave me the message that auth_joomdle was a success in install
when I go to activate it - there is no reference to it.
I am following the information given at
joomdle.com/index.php?option=com_content...7&Itemid=100&lang=en
and at the point of logging in to activate the module.
Can someone please give me some advice on what I may have done wrong or where to look for this module.

using moodle version 2.0
thanks

Hi.

Joomdle has not been tested with Moodle 2.0 yet, and some users already reported that it did not work some time ago.

Work to make Joomdle run in Moodle 2.0 will start soon, although there is not an estimation on when it will be completed.

Also, if you are really using R0.22, you should upgrade to a newer version. I hope the new one will be released thos or the next week.