Redmine

Hello,
my server contains my Gitlab project: https://gitlab.xxxxxxxx.it/root/TestingLabsTools-WebServer
I activated in Gitlab the Redmine service for issue tracking for https://redminetlt.xxxxxxx.it/redmine/projects/testinglabstools-webserver

When I commit a new develop with message "... refs #xx ...", if I click on "#xx" I can read in Readmine the issue.

However in Redmine there are no updates on the issue. Even if I commit with "Fix #xx" or "fixes #xx", I cannot get the updates on the Redmine issue

Could someone explain me how to configure Redmine?

Thanks Riccardo