1. I added some dynamic fields by Frontend::Agent::Ticket::ViewFreeText (system config) in my OTRS Helpdesk version 3.2.3. These fields were all available by the free field link :

2. I installed the ITSM package to the helpdesk version (3.2.3), all work fine but free field link disappeared and now a new link appeared (additionnal ITSM feilds) without my dynamic fields defined.

How to redisplay my free field link to access my dynamics feilds?
I missed something?
Thank you for your comments,
Éric