Task manager cannot update tasks

Hi all, I created a project and defined task manager on some tasks.
After this, I login in Team member Home page as with task manager user.
But in the task list or project list I cannot find tasks assigned.

About setup; I checked 'allow collaborative progress' and settled PA: Task manager as team member to 'Yes'.

Do I use a wrong responsability or I  missed any setup step?

Thanks all,

Elena Bevilacqua