plugin username not working

Hi

I am new at squirrelmail, but have got the basics working.

However I have a number of accounts that I administer and therefore tried
to add the username plugin. I installed and configured it according to
documentation, but it is not showing anything anywhere on the logged-in
page.

Squirrelmail vers 1.4.22
configtest shows all ok

username plugin 2.3
compatibility plugin 2.0.16

on Fedora 18
apache httpd-2.4.4-2.fc18.x86_64
links to dovecot and sendmail on separate physical machine

Regards
Ken


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