Custom modules not visible by the other users of my organisation

Custom modules not visible by the other users of my organisation

Dear All,

I created a custom module to manage a list of participants to our events
(which is different from our accounts / clients contact base)

This module was created by me (Admin rights)

Now I would like my colleagues to see it and use it as well.
Yet it is not visible in their Zoho CRM.

How could you explain that ?
What shall I do to rectify this ?

Thanks in advance
Laure